A pdf list for all the publications 

Books

Frontiers of 4d- and 5d- Transition Metal Oxides, Gang Cao and Lance E. De Long, World Scientific ISBN: 978-981-4374-859 328 pp June 2013

Book cover for Frontiers of 4d and 4d transition metal oxides

Published Articles

2017

  1. “New evidence for a magnetic state in double-perovskite iridates with Ir5+(5d4) ions”, J. Terzic, H. Zhang, Feng Ye, P. Schlottmann, H. D. Zhao, L. DeLong, S. J. Yuan and G. Cao, Phys. Rev. B 96, 064436 (2017)
  2. “Optical signatures of spin-orbit exciton in bandwidth-controlled Sr2IrO4 epitaxial films via high-concentration Ca and Ba doping”, M. Souri, B. H. Kim, J. H. Gruenewald, J. G. Connell, J. Thompson, J. Nichols, J. Terzic, B. I. Min, G. Cao, J. W. Brill, and A. Seo, Phys. Rev. B 95, 235125 (2017)
  3.  “Electron Doping Evolution of Magnetic Excitations and Spin-Orbit Excitons in (Sr1−xLax)3Ir2O7”, Xingye Lu, D. E. McNally, M. Moretti Sala, J. Terzic, M. H. Upton, D. Casa, G. Cao, and T. Schmitt, Phys. Rev. Lett. 118, 027202 (2017)
  4. “Giant Spin Gap and Magnon Localization in a Disordered Heisenberg Antiferromagnet Sr2Ir1-xRuxO4”, Yue Cao, Xuerong Liu, Wenhu Xu, Weiguo Yin, Derek Meyers, Jungho Kim, Diego Casa, Mary Upton, Thomas Gog, Tom Berlijin, Gonzalo Alvarez, Shujuan Yuan, Jasminka, Terzic, John M. Tranquada, John P. Hill, Gang Cao, Robert M. Konik, and M. P. M. Dean, Phys. Rev. B. 95 121103 (2017)
  5. “Charge partitioning and anomalous hole doping in Rh-doped Sr2IrO4”, S. Chikara, G. Fabbris, J. Terzic, G. Cao, D. Khomskii, and D. Haskel, Phys. Rev. B Rapid Comm.95, 060407 (R) (2017)
  6. “Predicted electronic markers for polytypes of LaOBiS2 examined via angular resolved photoemission spectroscopy”, Xiaoqing Zhou, Qihang Liu, J. A. Waugh, Haoxiang Li, T. Nummy, Xiuwen Zhang, Xiangde Zhu, Gang Cao, Alex Zunger and D. S. Dessau, Phys. Rev. B 95, 075118 (2017)
  7. “In-plane magnetic anisotropy of the Sr4Ru3O10 nanosheet probed by planar Hall effect”, Yan Liu, Jiyong Yang, Weiwei Chu, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, Zhe Qu, Gang Cao, Yuheng Zhang, and Mingliang Tian, Appl. Phys. Lett. 111, 033103 (2017)
  8. “Determination of Hund's coupling in 5d oxides using resonant inelastic x-ray scattering”, Bo Yuan, J. P. Clancy, A. M. Cook, C. M. Thompson, J. Greedan, G. Cao, B. C. Jeon, T. W. Noh, M. H. Upton, D. Casa, T. Gog, A. Paramekanti, and Young-June Kim, Phys. Rev. B 95, 235114 (2017)
  9. Suppression of magnetism in Ba5AlIr2O11: interplay of Hund's coupling, molecular orbitals and spin-orbit interaction”, Sergey V. Streltsov, Gang Cao, and Daniel I. Khomskii, Phys. Rev. B 95, 014434 (2017)

2016

  1. “Simultaneous Metal-Insulator and Antiferromagnetic Transitions in Orthorhombic Perovskite Iridate Sr0.94Ir0.78O2.68 Single Crystals”, H. Zheng, J. Terzic, Feng Ye, X.G. Wan, D. Wang, Jinchen Wang, Xiaoping Wang, P. Schlottmann, S. J. Yuan and G. Cao, Phys. Rev. B 93, 235157 (2016)
  2. “Electrically tunable transport and high-frequency dynamics in antiferromagnetic Sr3Ir2O7”, Heidi Seinige, Morgan Williamson, Shida Shen, Cheng Wang, Gang Cao, Jianshi-S. Zhou, John B. Goodenough, Maxim Tsoi, Phys. Rev. B 94, 214434 (2016)
  3. “Anisotropic softening of magnetic excitations in lightly electron doped Sr2IrO4”, X. Liu, M. P. M. Dean, Z. Y. Meng, M. H. Upton, T. Qi, T. Gog, H. Ding, G. Cao, and J. P. Hill, Phys. Rev. B 93, 241102(R) (2016)
  4. “Hallmarks of the Mott-Metal Crossover in the Hole Doped J=1/2 Mott insulator Sr2IrO4”, Yue Cao, Qiang Wang, Justin A. Waugh, Theodore Reber, Haoxiang Li, Xiaoqing Zhou, Stephen Parham, Nicholas Plumb, Eli Rotenberg, Aaron Bostwick, Jonathan Denlinger, Tongfei Qi, K. Orenta, Michael Hermele, G. Cao and Daniel S. Dessau, Nature Comm., 2016 doi:10.1038/ncomms11367
  5. “X-ray Absorption Spectroscopy Study of the Effect of Rh doping in Sr2IrO4”, C. H. Sohn, Deok-Yong Cho, C. T. Kuo, L. J. Sandilands, T. F. Qi, G. Cao & T. W. Noh, Scientific Reports 6, 23856 (2016)
  6. “Investigations of metastable Ca2IrO4 epitaxial thin-films: systematic comparison with Sr2IrO4 and Ba2IrO4, M. Souri, J. H. Gruenewald, J. Terzic, J. W. Brill, G. Cao & S. S. A. Seo, to appear on Scientific Report, 2016
  7.  “Engineering One-Dimensional Quantum Stripes from Superlattices of Two-Dimensional Layered Materials”, S. S. A. Seo, J. Nichols, J. Hwang, J. H. Gruenewald, M. Souri, J. Thompson, J. G. Connell, J. Terzic, and G. Cao, Advanced Materials, 2016
  8. “Ground state tuning by spin-orbit and lattice degrees of freedom in hexagonal BaIr1xRuxO3 (0  1)”, S. J. Yuan, K. Butrouna, J. Terzic, S. Aswartham, L. E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 93, 165136 (2016)
  9. “Pressure-Induced Confined Metal from the Mott Insulator Sr3Ir2O7”, Yang Ding, Cheng-Chien Chen, Heung-Sik Kim, Myung Joon Han, Zhenxing Feng, Mary Upton, Jungho Kim, Diego Casa, Ayman Said, Yufeng Peng, G. Cao, Thomas Gog, Ho-kwang Mao, and Michel van Veenendaal, Phys. Rev. Lett. 116, 216402 (2016)
  10.  “Isotropic and Anisotropic FieldDependent Regimes of the SpinWave Excitations in Sr2IrO4: Raman Scattering Studies”, Y. Gim, A. Sethi, J.F. Mitchell, G. Cao, and S. L. Cooper, Phys. Rev. B 93, 024405 (2016)
  11. “Size effect on the magnetic phase in Sr4Ru3O10”, Yan Liu, Jiyong Yang, Weike Wang, Haifeng Du, Wei Ning, Langsheng Ling, Wei Tong, ZheQu, Zhaorong Yang, Mingliang Tian, Gang Cao and Yuheng Zhang, New J. Phys. 18 053019 (2016)
  12. “Epitaxial Ba­2IrO4 thin-films grown on SrTiO3 substrates by pulsed laser deposition”, J. Nichols, O. B. Korneta, J. Terzic, G. Cao, J. W. Brill, and S. S. A. Seo, Applied Physics Letters 104, 121913 (2014)

2015

  1.  “Evidence of an odd-parity hidden order in a strongly spin-orbit coupled correlated iridates”, L. Zhao, D. H. Torchinsky, H. Chu, V. Ivanov, R. Lifshitz, R. Flint, T. Qi, G. Cao and D. Hsieh, Nature Physics, 2015 doi:10.1038/nphys3517
  2. “Anomalous High-Energy Waterfall-Like Electronic Structure in 5d Transition Metal Oxide Sr2IrO4 with a Strong Spin-Orbit Coupling”, Yan Liu, Li Yu, Xiaowen Jia, Jianzhou Zhao, Hongming Weng, Yingying Peng, Chaoyu Chen, Zhuojin Xie, Daixiang Mou, Junfeng He, Xu Liu, Ya Feng, Hemian Yi, Lin Zhao, Guodong Liu, Shaolong He, Xiaoli Dong, Jun Zhang, Zuyan Xu, Chuangtian Chen, Gang Cao, Xi Dai, Zhong Fang & X. J. Zhou, Scientific Reports 5, 13036 (2015)
  3. “Crystal and Magnetic Structures in Square Lattice Iridate Sr2Ir1-xRhxO4”, Feng Ye, Xiaoping Wang, Christina Hoffmann, Songxue Chi, Masaaki Matsuda, Bryan C. Chakoumakos, Jaime A. Fernandez-Baca, Jinchen Wang and G. Cao, Phys. Rev. B, 92 201112(R) (2015)
  4. “Decoupling of the Antiferromagnetic and Insulating States in Tb doped Sr2IrO4”, J. C. Wang, S. Aswartham, F. Ye, J. Terzic, H. Zheng, Daniel Haskel, Shalinee Chikara, Yong Choi, P. Schlottmann, S. J. Yuan1 and G. Cao, Phys. Rev. B 92, 214411 (2015)
  5. “From Jeff=1/2 insulator to p-wave superconductor in single-crystal Sr2Ir1-xRuxO4 (0 £ x £ 1)”, S. J. Yuan, S. Aswartham, J. Terzic, H. Zheng, H. D. Zhao, P. Schlottmann and G. Cao, Phys. Rev. B 92, 245103 (2015)
  6. “A structural distortion induced magneto-elastic locking in Sr2IrO4revealed through nonlinear optical harmonic generation”, D. H. Torchinsky, H. Chu, L. Zhao, N. B. Perkins, Y. Sizyuk, T. Qi, G. Cao, and D. Hsieh, Phys. Rev. Lett. 114, 096404 (2015)
  7. “Coexisting charge and magnetic orders in the dimer-chain iridate Ba5AlIr2O11”, J. Terzic, J. C. Wang, Feng Ye, W. H. Song, S. J. Yuan, S. Aswartham, L. E. DeLong, S.V. Streltsov, D.I. Khomskii and G. Cao, Phys. Rev. B 91, 235147 (2015)
  8. “Sr2Ir1−xRhxO4 (x < 0.5): an inhomogeneous Jeff=1/2 Hubbard system”, Shalinee Chikara Daniel Haske, Jae-Hoon Sim, Heung-Sik Kim, Cheng-Chien Chen, G. Fabbris, L. S. I.Veiga, N. M. Souza-Neto, J. Terzic, K. Butrouna, G. Cao, Myung Joon Han, and Michel van Veenendaa, Phys. Rev. B 92, 081114(R) (2015)
  9. “Electrically Tunable Transport in the Antiferromagnetic Mott Insulator Sr2IrO4”, C. Wang, H. Seinige, G. Cao, J.-S. Zhou, J. B. Goodenough, M. Tsoi, Phys. Rev. B 92, 115136 (2015)
  10. “Evolution of Magnetism in Single-Crystal Ca2Ru1-xIrxO4 (0 ≤ x ≤ 0.65)”, S. J. Yuan, J. Terzic, J. C. Wang, S. Aswartham, W. H. Song, F. Ye , and G. Cao, Phys. Rev. B 92, 024425 (2015)
  11. “Confinement-Deconfinement Transition as an Indication of Spin-Liquid-Type Behavior in Na2IrO3”, Zhanybek Alpichshev, Fahad Mahmood, G. Cao, and Nuh Gedik, Phys. Rev. Lett. 114, 017203 (2015)
  12. “High-energy electronic excitations in Sr2IrO4 observed by Raman scattering”, Jhih-An Yang, Yi-Ping Huang, Michael Hermele, Tongfei Qi, Gang Cao, and Dmitry Reznik, Phys. Rev. B 91, 195140 (2015)
  13. “Experimental Electronic Structure of the Metallic Pyrochlore Iridate Bi2Ir2O7”, Q. Wang, Y. Cao, X. Wan, J. D. Denlinger, T. F. Qi, O. B. Korneta, G. Cao, and D. S. Dessau, J Phys. Condensed Matter 27 015502 (2015)

2014

  1. “Novel magnetism of Ir5+ (5d4) ions in the double perovskite Sr2YIrO6”, G. Cao, T. F. Qi, L. Li, J. Terzic, S. J. Yuan, L. E. DeLong, G. Murthy and R. K. Kaul, Phys. Rev. Lett. 112, 056402 (2014)
  2. “Lattice-Tuned Magnetism of Ru4+(4d4) Ions in Single-Crystals of the Layered Honeycomb Ruthenates: Li2RuO3 and Na2RuO3”, J. C. Wang, J. Terzic, T. F. Qi, Feng Ye, S. J. Yuan, S. Aswartham, S. V. Streltsov, D. I. Khomskii, R. K. Kaul and G. Cao, Phys. Rev. B 90 161110 (R) (2014)
  3. “Tuning Magnetic Coupling in Sr2IrO4Thin Films with Epitaxial Strain”, A. Lupascu, J. P. Clancy, H. Gretarsson, Zixin Nie, J. Nichols, J. Terzic, G. Cao, S. S. A. Seo, Z. Islam,  M. H. Upton,  Jungho Kim,  D. Casa,  T. Gog,  A. H. Said, Vamshi M. Katukuri,  H. Stoll,  L. Hozoi,  J. van den Brink, and Young-June Kim, Phys. Rev. Lett. 112, 147201 (2014)
  4. “Orbital-Dependent Polaron Formationin Relativistic Mott Insulator Sr2IrO4”, C. H. Sohn, Min-Cheol Lee, Hyun-Ju Park, Kyung Ju Noh, H. K. Yoo, S. J. Moon, K. W. Kim, T. F. Qi, G. Cao, Deok-Yong Cho, and T. W. Noh, Phys. Rev. B 90 041105(R) (2014)
  5. “Different response of transport and magnetic properties of BaIrO3 to chemical and physical pressure”, M. A. Laguna-Marco, G. Fabbris, N. M. Souza-Neto, S. Chikara, J. S. Schilling, G. Cao, and D. Haskel, Phys. Rev. B 90 014419 (2014)
  6. “Anisotropic Magnetoresistance in Antiferromagnetic Sr2IrO4”, C. Wang, H. Seinige, G. Cao, J.-S. Zhou, J. B. Goodenough, M. Tsoi, Phys. Rev. X 4, 041034 (2014)
  7. “Local density of states study of a spin-orbit-coupling induced Mott insulator Sr2IrO4, Jixia Dai, Eduardo Calleja, G. Cao, and Kyle McElroy, Phys. Rev. B 90, 041102(R) (2014)
  8. “A Low Temperature Nonlinear Optical Rotational Anisotropy Spectrometer for the Determination of Crystallographic and Electronic Symmetries”, Darius H. Torchinsky, Hao Chu, Tongfei Qi, Gang Cao, and David Hsieh, Review of Scientific Instruments 85, 015408 (2014)
  9. “Dilute Magnetism and Spin-Orbital Percolation Effects in Sr2Ir1-xRhxO4”, J.P. Clancy, A. Lupascu, H. Gretarsson, Z. Islam, Y. F. Hu, D. Casa, C.S. Nelson, S.C. LaMarra, G. Cao, and Young-June Kim, Phys. Rev. B 89, 054409 (2014)
  10. “Epitaxial Ba­2IrO4 thin-films grown on SrTiO3 substrates by pulsed laser deposition”, J. Nichols, O. B. Korneta, J. Terzic, G. Cao, J. W. Brill, and S. S. A. Seo, Applied Physics Letters 104, 121913 (2014)
  11. "Pressure induced second-order structural transition in Sr3Ir2O7, Zhao Zhao, Shibing Wang, Tongfei Qi, Qiaoshi Zeng, Shigeto Hirai, Panpan, Kong, L. Li, C. Park, S. J. Yuan, Changqing Jin, G. Cao and Wendy Mao, J. Physics: Condensed Matter 26, 121913 (2014)
  12. “Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7”, H. J. Park, C. H. Sohn , D. W. Jeong, G. Cao, K. W. Kim, S. J. Moon, Hosub Jin, Deok-Yong Cho  and T. W. Noh,  Phys. Rev. B 89 155115 (2014)

2013

  1. “Evolution of Magnetism in Single-Crystal Honeycomb Iridates”, G. Cao, T. F. Qi,  L. Li,  J. Terzic,  V. S. Cao, S. J. Yuan, M. Tovar,  G. Murthy,  and R. K. Kaul, Phys. Rev B 88 220414 (R) (2013)
  2.  “Ferromagnetic Anisotropy from Antiferromagnetic Superexchange in the Mixed 3d − 5d Transition-Metal Compound Sr3CuIrO6”, Wei-Guo Yin,  X. Liu,  A. M. Tsvelik,  M. P. M. Dean,  M. H. Upton, Jungho Kim, D. Casa, A. Said,  T. Gog,  T. F. Qi,  G. Cao, and J. P. Hill, Phys. Rev. Lett. 111, 057202 (2013)
  3.  “Anisotropic electronic properties of a-axis-oriented Sr2IrO4 epitaxial thin-films”, J. Nichols, O. B. Korneta, J. Terzic, L. E. De Long, G. Cao, J. W. Brill, and S. S. A. Seo, App. Phys. Lett. 102, 141908 (2013)
  4.  “Tuning Jeff = 1/2 Insulating State via Electron Doping and Pressure in Double-Layered Iridate Sr3Ir2O7”, L. Li, P. P. Kong, T. F. Qi, C. Q. Jin, S. J. Yuan, L. E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 87, 235127 (2013)
  5.  “Giant vertical magnetization shift induced by spin canting in a Co/Ca2(Ru 0.98Fe0.02)O4 heterostructure”, S. J. Yuan, L. Li, T. F. Qi, L. D. DeLong and G. Cao, Phys. Rev. B 88, 024413 (2013). Selected as Editors Suggestion
  6. “Strain-dependent optical properties of epitaxial Sr­2IrO4 thin-films”, J. Nichols, J. Terzic, E. G. Bittle, O. B. Korneta, L. E. De Long, J. W. Brill, G. Cao, and S. S. A. Seo, App. Phys. Lett. 102, 141908 (2013)
  7. “The magnetic and crystal structures of Sr2IrO4: A neutron diffraction study”, Feng Ye, Songxue Chi, Bryan C. Chakoumakos, Jaime A. Fernandez-Baca, Tongfei Qi, and G. Cao, Phys. Rev. B 87, 140406(R) (2013)
  8. “First-order spin reorientation transition and specific-heat anomaly in CeFeO3”, S. J. Yuan, Y.M. Cao, T.F. Qi, S. X. Cao, J. C. Zhang, L. E. DeLong and G. Cao, J. Appl. Phys. 114, 113909 (2013)
  9. “Superconductivity and anomalous electrical resistivity in Single-Crystal Ir3Te8”, L. Li, T. F. Qi, L. S. Lin, X. X. Wu, X.T. Zhang, K. S. J. Yuan, Butrouna, V. S. Cao, Y. H. Zhang, Jiangping Hu, P.  Schlottmann, L. E. DeLong and G. Cao, Phys. Rev. B 87, 174510 (2013)
  10. “Identification of the Spin-orbit-induced Jeff = 1/2 State in Na2IrO3: Spectroscopic and Density-functional Calculation Study”, C. H. Sohn, H. S. Kim, T. F. Qi, D. W. Jeong, Hyun-Ju Park, H. K. Yoo, H. H. Kim, J. -Y. Kim, T. D. Kang, G. Cao, J. Yu, S. J. Moon, and T. W. Noh, Phys. Rev. B 88, 085125 (2013)
  11. “Dimensionality controlled Mott transition in single- and bi-layer perovskite iridates”, Q. Wang, Y. Cao, J. A. Waugh, T. F. Qi, O. B. Korneta, G. Cao, and D. S. Dessau, Phys. Rev B 87 245109 (2013)
  12. “Weak magnetic transitions in pyrochlore Bi2Ir2O7”, P. J. Baker, J. S. MÄoller, F. L. Pratt, W. Hayes, S. J. Blundell, T. Lancaster, T.-F. Qi, and G. Cao, Phys. Rev. B 87 180409 (R) (2013)

2012

  1.  “Spin-orbit tuned metal-insulator transitions in single-crystal Sr2Ir1-xRhxO4 (0£x£1)”, T. F. Qi, O. B. Korneta, L. Li, K. Butrouna, V. S. Cao, Xiangang Wan, R. Kaul and G. Cao, Phys. Rev. B 86, 125105 (2012)
  2. “Magnetic symmetries in neutron and resonant x-ray Bragg diffraction patterns”, S. W. Lovesey, D. D. Khalyavin, P. Manuel, L. C. Chapon, G. Cao and T. F. Qi, J. Phys.: Condens. Matter 24 496003 (2012)
  3. “Field-induced magnetic behavior of the bilayer iridate Sr3Ir2O7”, J.P. Clancy, K.W. Plumb, C.S. Nelson, Z. Islam, G. Cao, T. Qi, and Young-June Kim, submitted to Phys. Rev. B, 2012
  4. “Spin switching and magnetization reversal in single-crystal NdFeO3, Shujuan Yuan, Wei Ren, Fang Hong, La Chen, Yabin Wang, Jincang Zhang, L. Bellaiche, Shixun Cao, and G. Cao, Phys. Rev. B 87, 184405 (2013)
  5. “Pressure-tuning of spin-orbit coupled ground state in Sr2IrO4, D. Haskel, G. Fabbris, Mikhail Zhernenkov, M. van Veenendaal, P. Kong, C. Jin, G. Cao, Phys. Rev. Lett. 109, 027204 (2012)
  6. “Observation of a metal-to-insulator transition with both Mott-Hubbard and Slater characteristics in Sr2IrO4 from time-resolved photocarrier dynamics”, D. Hsieh, F. Mahmood, D. Torchinsky, G. Cao and N. Gedik, Phys. Rev. B 86, 035128 (2012)
  7.  “Orbit-Coupling Limit for Octahedrally Coordinated Iridate Compounds in a Model System Sr3CuIrO6”, X. Liu, Vamshi Katukuri, Liviu Hozoi, Wei-Guo Yin, M. P. M. Dean, Mary Upton, Jungho Kim, Diego Casa, Tongfei Qi, G. Cao, A. M. Tsvelik, Jeroen van den Brink, and J. P. Hill, Phys. Rev Lett. 109, 157401 (2012)
  8. “Direct evidence of a zigzag spin-chain structure in honeycomb lattice: A neutron and x-ray diffraction investigation on single-crystal Na2IrO3, Feng Ye, Songxue Chi, Huibo Cao, Bryan Chakoumakos, Jaime A. Fernandez-Baca, Radu Custelcean, Tongfei Qi, O. B. Korneta, and G. Cao, Phys. Rev. B 85, 180403(R) (2012)
  9. “Strong magnetic instability in correlated metal Bi2Ir2O7”, T. F. Qi, O. B. Korneta, and Xiangang Wan, and G. Cao, J of Phys: Condens Matter 24, 345601 (2012)  This paper is featured in Lab Talk of JPCM on Issue August 2, 2012
  10. “Magnetic and Orbital Orders Coupled to Negative Thermal Expansion in Mott Insulators Ca2Ru1-xMxO4 (M=Mn and Fe)”, T. F. Qi, O. B. Korneta, S. Parkin, Jianping Hu and G. Cao, Phys. Rev. B, 85 165143 (2012)

2011

  1. “Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates”, M. Ge, T. F. Qi, O.B. Korneta, L.E. De Long, P. Schlottmann and G. Cao, Phys Rev B 84, 100402(R) (2011)
  2. “Measurements of the Internal Magnetic Field in the Correlated Iridates Ca4IrO6, Ca5Ir3O12, Sr3Ir2O7 and Sr2IrO4”, I. Franke, P.J. Baker, S.J. Blundell, T. Lancaster, W. Hayes, F.L. Pratt, and G. Cao, Phys. Rev. B 83 094416 (2011)
  3. “Giant Magnetoelectric Effect in Antiferromagnetic BaMnO2.99 and Its Derivatives”, O. B. Korneta, T.F. Qi, M. Ge, L.E. DeLong, P. Schlottmann and G. Cao, J. Phys.: Condens. Matter 23 435901 (2011)
  4. “Structurally-Driven Metal-Insulator Transition in Ca2Ru1-xCrxO4 (0 < x < 0.14): A Single Crystal x-ray Diffraction Study”, Tongfei Qi, Min Ge, O.B. Korneta; Sean Parkin;, and G Cao, J. Solid State Chem. 184, 893 (2011)
  5. “Magnetic anisotropy and geometrical frustration in the Ising spin-chain system Sr5Rh4O12”, G. Min, S. Parkin, P. Schlottmann, and G. Cao, J. Appl. Phys., 109, 07E164 (2011)

2010

  1. “Negative Volume Thermal Expansion via Orbital and Magnetic Orders in Single-Crystal Ca2Ru1-xCrxO4”, T.F. Qi, O.B. Korneta, S. Parkin, L.E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. Lett. 105, 177203 (2010)
  2. “Orbital Magnetism and Spin-Orbit Effects in the Electronic Structure of BaIrO3”, M. A. Laguna-Marco, D. Haskel, N. Souza-Neto, J. C. Lang, V. V. Krishnamurthy, S. Chikara, G. Cao, and Michel van Veenendaal, Phys. Rev. Lett. 105, 216407 (2010)
  3. “Electron-Doped Sr2IrO4-d (0 < d< 0.04):  Evolution of a Disordered Jeff = 1/2 Mott Insulator into an Exotic Metallic State”, O.B. Korneta, Tongfei Qi, S. Chikara, S. Parkin, L. E. DeLong, Pedro Schlottmann and G. Cao, Phys. Rev. B 82, 115117 (2010)
  4. “Pressure-induced Insulating State in Single-crystal Ba1-xGdxIrO3”, O. B.  Korneta, S. Chikara, L.E. DeLong. P. Schlottmann and G. Cao, Phys. Rev. B 81, 045101 (2010)
  5. “Giant Magneto-Electric Effect in 5d-based Iridates”, S. Chikara, O. Korneta, L.E. DeLong, P. Schlottmann and G. Cao, J Appl. Phys. 107, 09D718 (2010)
  6. "New Paradigms for Spin Valves", G. Cao, S. Chikara, O. Korneta, L.E. DeLong, and P. Schlottmann, J. Appl. Phys. 107, 09D910 (2010)
  7. The Promise of Strong Spin-Orbit Coupling: Novel Materials with Novel Properties for    Novel Devices”, L. E. De Long, L. Shlyk, G. Cao and R. Niewa, Proceedings of the International Conference on Electromagnetics in Advanced Applications 2010
  8. “Pressure-Induced Insulating State in Single-Crystal Ba1-xGdxIrO3”, Tongfei Qi, O. B. Korneta, S. Chikara, S. Parkin, L.E. DeLong, P. Schlottmann and G. Cao, J. Appl Phys., 2011

2009

  1.  “Giant Magneto-Electric Effect in the Jeff =1/2 Mott Insulator, Sr2IrO4”, S. Chikara, O. Korneta, W. P. Crummett, L.E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 80, 140407 (R) (2009)
  2. “Optical Spectroscopic Investigation on the Temperature-dependent Electronic Structure Evolution of the Jeff=1/2 Mott Insulator Sr2IrO4”, S. J. Moon, Hosub Jin, W. S. Choi, J. S. Lee, S. S. A. Seo, J. Yu, G. Cao, T. W. Noh, and Y. S. Lee, Phys. Rev. B 80, 195110 (2009)
  3. “New Materials for Spintronics”, Lance E. De Long, Larysa Shlyk, and G. Cao, IEEE, 2009

2008

  1. “Observation of Strong Spin Valve Effect in Bulk Ca3(Ru1-xCrx)2O7”, G. Cao, V. Durairaj S. Chikara L. E. DeLong and P. Schlottmann, Phys. Rev. Lett. 100, 106604 (2008)
  2. “Novel Jeff 1=2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4”, B. J. Kim, Hosub Jin, S. J. Moon, J.-Y. Kim, B.-G. Park, C. S. Leem, Jaejun Yu, T. W. Noh, C. Kim, S.-J. Oh, V. Durairai, G. Cao & J.-H. Park, Phys. Rev. Lett. 101, 076402 (2008)
  3. “Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Srn+1IrnO3n+1 (n=1, 2, and 1)”, S.J. Moon, H. Jin, K.W. Kim, W.S. Choi, Y.S. Lee, J. Yu, G. Cao, A. Sumi, H. Funakubo, C. Bernhard, and T.W. Noh, Phys. Rev. Lett. 101, 226401 (2008)
  4. “Non-Fermi-Liquid Behavior in Single-Crystal CaRuO3: Comparison to Ferromagnetic SrRuO3 , G. Cao, O. Korneta, S. Chikara, L. E. De Long and P. Schlottmann, Solid State Comm.148, 305 (2008)
  5. “A study of the Mott Transition in Ca3Ru2O7 by Tunneling Spectroscopy”, Anthony Bautista, V. Durairaj, S. Chikara, G. Cao, K.-W. Ng, A.K. Gupta, Solid State Comm. 148, 240 (2008)
  6. (Invited Review) “Ca3Ru2O7: A new paradigm for spintronics”, G. Cao and P. Schlottmann, Modern Physics Letters B 22, 1785-1813 ( 2008)
  7. “High Pressure Structural Studies on SrRuO3”, M.K. Jacobsen, R.S.  Kumar, G. Cao, J. J. Neumeier, A.L. Cornelius, Journal of Physics and Chemistry of Solids 69, 2237 (2008)

2007

  1. “Anomalous itinerant magnetism in single-crystal Sr4Ru3O10: A Thermodynamic and Transport Investigation” G. Cao, S. Chikara, J. W. Brill, and P. Schlottmann, Phys. Rev. B 75, 024429 (2007)
  2.  “Magnetic Anisotropy and Geometrical Frustration of an Ising One-Dimensional System Sr5Rh4O12”, G. Cao, S. Parkin, and P. Schlottmann, Solid State Comm.141, 369 (2007).
  3.  “Studies on the Weak Itinerant Ferromagnet SrRuO3 under High Pressure to 34 GPa”, J.J. Hamilin, S. Deemyad, J.S. Schilling, M.K. Jacobsen, R.S. Kumar, A.L. Cornelius, G. Cao and J.J. Neumeier, Phys. Rev. B 76, 014432 (2007)
  4. “Heat Capacity of (Ca1-xSrx)3Ru2O7 Single Crystals”, V. Varadarajan, S, Chikara, V. Durairaj, X.N. Lin, G. Cao, and J.W. Brill, Solid State Comm.141, 402 (2007)
  5. “Partial Antiferromagnetism in Spin-Chain Sr5Rh4O12, Ca5Ir3O12 and Ca4IrO6 Single Crystals” G. Cao, V. Durairaj, S. Chikara, S. Parkin and P. Schlottmann, Phys. Rev. B 75, 134402 (2007).
  6. “Crystal Structure, Magnetic, and Electronic Properties of a Ba3InRu2O9 Single Crystal” L. Shlyk, S. Kryukov, V. Durairaj, S. Parkin, G. Cao, L. E. De Long, JMMM 319, 64 (2007)
  7. “Non-Fermi-Liquid Behavior in Nearly Ferromagnetic Metal SrIrO3 Single Crystals”, G. Cao, V. Duarairaj, S. Chikara, L.E. DeLong, S. Parkin, and P. Schlottmann, Phys. Rev. B 76, 100402(R) (2007)

2006

  1. “Spectroscopic Study of the Field- and Pressure-Induced Phases of the Bilayered Ruthenates Ca3Ru2O7”, J. F. Karpus, C. S. Snow, R. Gupta, H. Barath, S. L.  Cooper, and G. Cao, Phys Rev B 73, 134407 (2006)
  2.  “Observation of Quantum Oscillations Periodic in 1/B and B in Bilayered Ca3Ru2O7”, V. Durairaj, X. N. Lin, Z.X. Zhou, S Chikara, E. Elhami, P. Schlottmann and G. Cao, Phys. Rev. B 73, 054434 (2006)
  3.  “Highly Anisotropic Magnetism in Cr doped Perovskite Ruthenates”, V. Durairaj, S. Chikara, X.N. Lin, A. Douglass, G. Cao, P. Schlottmann, E.S. Choi and R.P. Guertin, Phys. Rev B 73, 214414 (2006)
  4.  “Field- and Pressure-induced Phases in Sr4Ru3O10: A Spectroscopic Investigation” Rajeev Gupta, M. Kim, H. Barath, S.L. Cooper and G. Cao, Phys. Rev Lett. 96, 067004 (2006)
  5.  “Borderline Magnetism in Sr4Ru3O10: Impact of Dilute La and Ca Doping on Itinerant ferromagnetism and metamagnetism”, S. Chikara, V. Durairaj,  W.H. Song, Y.P. Sun, X.N. Lin, A. Douglass, G. Cao, P. Schlottmann, and S. Parkin, Phys. Rev. B 73, 224420 (2006).
  6.  “Electronic Structures of Layered Perovskite Sr2MO4 (M=Ru, Rh, and Ir)”, S. J. Moon, M. W. Kim, K. W. Kim, Y. S. Lee, J.-Y. Kim, J.-H. Park, B. J. Kim, S.-J. Oh, S. Nakatsuji, Y. Maeno, I. Nagai, S. I. Ikeda, G. Cao, and T. W. Noh, Phys. Rev. B 74, 113104 (2006)

2005

  1. “Angle-resolved de Hass-van Alphen study of SrRuO3”, C.S. Alexander, S. McCall, P. Schlottmann, J. E. Crow and G. Cao, Phys. Rev. B 72, 24415 (2005)
  2. “Raman scattering studies of field-induced melting of the orbital-ordered state of Ca3Ru2O7” J.F. Karpus, R.Gupta, H. Barah, S.L. Cooper and G. Cao, Physica B 359 1234 (2005) 
  3.   “From Itinerant Ferromagnetism to Insulating Antiferromagnetism: a Magnetic and Transport study of Single Crystal SrRu1-xMnxO3 (0≤x<0.60)”, G. Cao, S. Chikara, E. Elhami, X.N. Lin and P. Schlottmann, Phys. Rev. B 71, 035104 (2005)
  4. “Thermal and Magnetic Properties of the Spin-Chain Material, Pr3RuO7”, M. Freamat, X.N. Lin, V. Durairaj, S. Chikara, G. Cao, and J.W. Brill, Phys. Rev. B 72, 014458 (2005)
  5.  “Colossal Magnetoresistance by Avoiding a Ferromagnetic State in Mott System Ca3Ru2O7”, X. N. Lin, Z.X. Zhou, V. Durairaj, P. Schlottmenn and G. Cao, Phys. Rev. Lett. 95, 017203 (2005)
  6.  “Thermodynamic Properties of the Spin-chain Compound Pr3RuO7”, M. Freamat, X.N. Lin, V. Durairaj, S. Chikara, G. Cao, and J.W. Brill, J. Physique IV 131, 339 (2005)

2004

  1. “Field-Induced Orbital and Magnetic Phases in Ca3Ru2O7: Light Scattering Studies”, J.F.  Karpus, R. Gupta, Barath, S.L. Cooper and G. Cao, Phys. Rev. Lett. 93, 167205 (2004)
  2. (Invited Paper) “Orbitally-driven Behavior: Mott Transition, Quantum Oscillations and Colossal Magnetoresistance in Bilayered Ca3Ru2O7”, G. Cao, X.N. Lin, L. Balicas, S. Chikara, J.E. Crow and P. Schlottmann, a special issue on Orbital Physics, New Journal of Physics 6, 159 (2004).  http://www.iop.org/EJ/news/-topic=842 or http://www.iop.org/EJ/abstract/1367-2630/6/1/159/  Selected as IOP Select (IOP=Institute of Physics in Europe)
  3. “Dimer liquid state in the quantum antiferromagnet compound LiCu2O2” S. Zvyagin S, G. Cao, Y. Xin, S. McCall, T. Caldwell, W. Moulton, L.C. Brunel, A. Angerhofer, J.E. Crow, Phys. Rev. B 69, 189901 (2004)
  4. “Field-Tuned Collapse of an Orbital Ordered and Spin-polarized State: Colossal Magnetoresistance in Bilayered Ruthenate”, G. Cao, L. Balicas, X.N. Lin, S. Chikara, V. Durairaj, E. Elhami, J.W. Brill, R.C. Rai and J. E. Crow, Phys. Rev. B 69, 014404 (2004)
  5.  “High-temperature Weak ferromagnetism on the verge of a metallic state: Impact of dilute Sr-doping on BaIrO3”, G. Cao, S. Chikara, X.N. Lin, E. Elhami and V. Durairaj, Phys. Rev. B 69, 174418 (2004).
  6. “Transport and thermodynamic properties of Sr3Ru2O7 near the quantum critical point”, Z.X Zhou, S. McCall, C.S. Alexander, J.E. Crow, P. Schlottmann, A. Bianchi, C. Capan, R. Movshovich, K.H. Kim, M. Jaime, and N. Harrison, M. Haas, R. Cava and G. Cao, Phys. Rev. B 69, 140409  (2004)
  7. “Violation of the Mott-Ioffe-Regel Limit: High-temperature Resistivity of Itinerant Magnets Srn+1RunO3n+1 (n=2,3,¥) and CaRuO3,”, G. Cao, W.H. Song, Y.P. Sun and X.N. Lin, Solid State Comm., 131, 331 (2004)
  8. “Specific Heat of Sr4Ru3O10”, X.N. Lin, V.A. Bondarenko, G. Cao, J.W. Brill, Solid State Comm. 130 151 (2004)
  9. “Hydrostatic Pressure Effects on the Magnetic Susceptibility of Ruthenium oxide Sr3Ru2O7: Evidence for pressure-enhanced antiferromagnetic instability", Y. Sushko, J. W. Brill, and G. Cao, Solid State Comm. 130 341(2004)
  10. “Srn+1RunO3n+1: Nature’s engineered multi-layered systems”, C.G. Alexander, G.Cao, J.E. Crow and S. McCall, J. Alloys and Compounds 369, 2 (2004) 
  11. “Destruction of an Orbitally Ordered and Spin-polarized State: Colossal Magnetoresistance     in Ca3Ru2O7”, G. Cao, L. Balicas, X.N. Lin, S. Chikara, V. Durairaj, E. Elhami, J.W. Brill, R.C. Rai and J. E. Crow, Journal of Electronic Materials 33, 1303 (2004)

2003

  1. “Tunneling Magnetoresistance and Quantum Oscillations in Bilayered Ca3Ru2O7”, G. Cao, L. Balicas, Y. Xin, E. Dagotto, J.E. Crow, C.S. Nelson, and D.F. Agterberg, Phys. Rev. B 67 060406(R) (2003)
  2. “Mean Field Behavior with Gaussian Fluctuations at the Ferromagnettic Phase Transition of SrRuO3”, D. Kim, B.L. Zink, F. Hellman, S. McCall, G. Cao, and J.E. Crow, Phys. Rev. B 67, 100406 (R) (2003).
  3. “Interplay between Different Degrees of Freedom in Bilayered Ruthenate”, G. Cao, L. Balicas, Y. Xin, E. Dagotto, J. E. Crow, and C. S. Nelson, Physica C 387, 247 (2003)
  4. “Impact of Magnetic Fields on Anisotropy in Ca3Ru2O7”, S. McCall, G. Cao, and J.E. Crow, Phys. Rev. B 67, 094427 (2003).
  5. “Coloassal Magnetoresistance, Quantum Oscillations and Magnetoelastic Interactions in Bilayered Ca3Ru2O7”, G. Cao, L. Balicas, Y. Xin, J.E. Crow, and C.S. Nelson, Phys. Rev. B 67, 184405 (2003)
  6. Planar growth faults in double-layered or triple-layered (Ca,Sr)-ruthenate single crystals by the self-flux technique” Y. Xin, G. Cao, J.E. Crow, Journal of Crystal Growth  252 (1-3): 372 (2003)
  7. “Photo-induced transient thermoelectric effect in ferromagnetic BaIrO3”, A. Ohnishi, M. Sasaki, Y. Kuroda, M. Sato Y. Isobe and G. Cao, Physica B 329, 930 (2003)
  8. “Competing Ground State in Triple-layered Sr4Ru3O10: Verging on Itinerant Ferromagnestism with Critical Fluctuations”, G. Cao, L. Balicas, W. H. Song, Y. P. Sun, Y. Xin, V.A. Bondarenko, J.W. Brill, S. Parkin, and X. N. Lin, Phys. Rev. B 68 174409 (2003)

2002

  1. “Quantum oscillations, tunneling magnetoresistance and angular dependence of magnetization in Ca3Ru2O7”, G. Cao, International J of Modern Physics B 16, 3251 (2002)
  2. “Anomalous Magnetic and Transport properties in Magnetic Insulator Sr3Ir2O7”, G. Cao, Y. Xin, C. S. Alexander, J.E. Crow and P. Schlottmann, Phys. Rev. B 66, 214412 (2002)
  3. “Observation of quantum oscillations in four-layer BaRuO3” C S Alexander, Y Xin, Z. X. Zhou, S McCall, G. Cao, J E Crow,  International J of Modern Physics B 16, 3285, (2002)
  4. “Magnetic Interactions in (Pr,La)3RuO7 and Pr3(Ru, Nb)O7, Z.X. Zhou, G. Cao, C.S. Aleander and J.E. Crow, Philos Mag B 82, 1401 (2002)
  5. “Structure and Magnetism of Single Crystal Sr4Ru3O10: A Ferromagnetic Triple-Layered Ruthenates” M.K. Crawford, R.L. Harlow, W. Marshall, Z. Li, G. Cao, R.L. Lindstrom, Q. Huang, and J.W. Lynn. Phys. Rev. B 65, 214412 (2002)
  6. “Dimer Liquid State in the Quantum Antiferromagnet LiCu2O2: ESR Studies”, S. Svyagin, G. Cao, A. Angerhofer, Y. Xin, T. Caldwell, W. Moulton, L.-C. Brunel, and J.E. Crow, Phys. Rev. B 66, 064424 (2002).
  7. “Electron-spin Resonance Evidence of the Quantum Spin Gap in LiCu2O2”, S. Svyagin, G. Cao, A. Angerhofer, Y. Xin, T. Caldwell, W. Moulton, L.-C. Brunel, and J.E. Crow, Int. J. Mod Phys. 16 (20-22), 3373 (2002)
  8. “Observation of Quantum Oscillations in Four-Layer BaRuO3", C.S. Alexander, Y. Xin, Z.X.   Zhou, S. McCall, G. Cao, J.E. Crow, p.393, Physical Phenomena at High Magnetic Fields-IV, (World Scientific, New Jersey, 2002)
  9. Electron-spin Resonance Evidence of the Quantum Spin Gap in LiCu2O2”, S. Svyagin, G. Cao, L.-C. Brunel, and J.E. Crow, p481, Physical Phenomena at High Magnetic Fields-IV, (World Scientific, New Jersey, 2002)
  10. “Quantum Oscillations, Tunneling Magnetoresistance and Angular Dependence of Magnetization in Ca3Ru2O7”, G. Cao, p357, Physical Phenomena at High Magnetic Fields-IV, (World Scientific, New Jersey, 2002)
  11. “Quasi-one-dimensional BaIrO3: On the Verge of a Weak Ferromagnetic Metallic State” G. Cao, J. W. Brill and G. Shaw, J. Phys. IV France 12, Pr9-91, (2002)
  12. “Observation of Quantum Oscillations in Four-Layer BaRuO3”, C.S. Alexander, C.S. Y. Xin, Z.X. Zhou, S. McCall, G. Cao, and Crow, J.E., Int. J. Mod. Phys. B, 16 (20-22), 3285 (2002)
  13. “Sensitivity to Disorder of the Metallic State in the Ruthenates”, L. Capogna, A. P. Mackenzie, R. S. Perry, S. A. Grigera, L. M. Galvin, P. Raychaudhuri, A. J. Schofield, C. S. Alexander, G. Cao, S. R. Julian, and Y. Maeno, Phys. Rev Lett. 88, 76602 (2002) 
  14. “Temperature-dependent Raman Spectroscopy in BaRuO3 Systems”, Y.S. Lee, T.W. Noh, J.H. Park, K.-B. Lee, G. Cao, J.E. Crow, M.K. Lee, C. B. Eom, E.J. Oh and In-Sang Yang, Phys. Rev. B 65, 235113 (2002)
  15. “Pressure-Tuned Collapse of the Mott-like State in Can+1RunO3n+1 (n=1,2): Raman Spectroscopic Stduies”, C.S. Snow, S.L. Cooper, G. Cao, J.E. Crow, S. Natatsuji, and Y. Maeno, Phys. Rev. Lett. 89, 226401 (2002)

2001

  1. “Ferromagnetic Polarons in Dilute La-doped Ca2RuO4”, G. Cao, C.S. Alexander, J.E. Crow and R.P. Guertin, J. Magn. and Magn. Mater. 226-230, 235 (2001)
  2. “Thermodynamic Properties of RE2RuO5 (RE=rare ion)”, G.Cao, S. McCall, Z.X. Zhou, C.S. Alexander, and J.E. Crow, J. Magn. and Magn. Mater. 226-230, 218 (2001)
  3. “Magnetic Ordering and Enhanced Specific Heat in Insulating Ln2RuO5 (Ln=Nd, Pr, Sm, Gd and Tb)”, G. Cao, S. McCall, Z.X. Zhou, C.S. Alexander, and J.E. Crow, Phys. Rev B 63, 144427 (2001)
  4. “Pseudogap Formation in 4d-transition Metal Oxide BaRuO3”, Y.S. Lee, T.W. Noh, Jaejun Yu, J.S. Lee, K.W. Kim, E.J. Choi, G. Cao, and J.E. Crow, Europhys. Lett. 55, 280 (2001)
  5. “Weak Ferromagnetism and Spin-Charge Coupling in Single Crystal Sr2YRuO6”, G. Cao, C.S. Alexander, Y Xin and J.E. Crow, Phys. Rev. B 63,184432 (2001)
  6. “Optical Properties of BaRuO3: Observations of Pseudogap Formation” T.W. Noh, Y.S. Lee, J.S. Lee, K.W. Kim, Jaejun Yu, G. Cao, J.E. Crow, M.K. Lee, C.B. Eom, Current Applied Physics 1, 163 (2001)
  7. “BaRuO3: A New Type of pseudo-gap system” T. W. Noh, Y. S. Lee, J. S. Lee, K. W. Kim, J. Yu, G. Cao, J. E. Crow, M. K. Lee and C. B. Eom, Physica C 364-365, 480 (2001)

2000

  1. “Ground-State Instability of Mott Insulator Ca2RuO4: Impact of Slight La-doping on Metal-Insulator Transition and Magnetic Ordering”, G. Cao, S. McCall, V. Dobrosavljevic, S.C. Alexander, and J.E. Crow, and R.P. Guertin, Phys. Rev. B 61, R5053 (2000)
  2. “Charge Density Wave Formation Accompanying Ferromagnetic Ordering in Quasi-one-dimensional BaIrO3”, G. Cao, J.E. Crow, R.P. Guertin, P. Henning, C.C. Homes, M. Strongin, D.N. Basov, and E. Lochner, Solid State Comm. 113, 657 (2000)
  3. “Spin-Charge Coupling for Dilute La-doped Ca3Ru2O7”, G. Cao, K. Abbound, S. McCall, J.E. Crow and R.P.Guertin, Phys. Rev. B 62, 998 (2000)
  4. “Temperature dependence of the hyperfine magnetic field in SrRuO3 measured by the 99Ru Mössbauer effect”, Michael DeMarco, G. Cao, J. E. Crow, Dermot Coffey, Steve Toorongian, Michael Haka, and Joel Fridman, Phys. Rev. B 62, 14297 (2000)
  5. “Superfluid and normal-fluid densities in the high-Tc superconductors”, D.B. Tanner, F. Gao, K. Kamaras, H.L. Liu, M.A. Quijada, D.B. Romero, Y.D. Yoon, A. Zibold, H. Berger, G. Margaritondo, L.Forro, R.J. Kelly, M. Onellion, G. Cao, J.E. Crow, O Beom-Hoan, J.T. Markert, J.P. Rice, D.M. Ginsberg, T. Wolf, Physica C 341: 2193 (2000)

1999

  1. “Itinerant to Localized Electron Transition in Single Crystal Sr1-xNaxRuO3”, C.S. Alexander, G. Cao, S. McCall, and J.E. Crow, J. Appl. Phys. 85, 6223 (1999).
  2. “Localization and Transport in Pseudoternary Ruthenates”, G. Cao, V. Dobrosavljevic, S. McCall, J.E. Crow and R.P. Guertin, Physica B 259-261, 951 (1999).
  3. “Destruction of the Mott Insulating Ground State of Ca2RuO4 by a Structural Transition,” C.S. Alexander, G. Cao, V. Dobrosavljevic, E. Lochner, S. McCall, J.E. Crow and P.R. Guertin, Phys. Rev. B 60, R8422 (1999)
  4. “Doping-induced Change of Optical Properties in Underdoped Cuprate Superconductors”, H.L. Liu, M. A. Quijada, A.M. Zibold, Y-D Yoon, D.B. Tanner, G. Cao, J.E. Crow, H. Berger, G. Margaritondo, L. Forro, Beom-Hoan O, J.T. Markert, R. J. Kelly and M. Onellion, J. Phys.: Condensed Matter 11 239 (1999)
  5. “From Antiferromagnetic Insulator to ferromagnetic Metal: A Brief Review of the Layered Ruthenates”, G. Cao, C. S. Alexander, S. McCall, J. E. Crow, and R. P. Guertin, Materials Science and Engineering B 63, 76 (1999)
  6. “Spin Glass Behavior in Single Crystal and Sintered SrRuO3”, S. Reich, Y. Tsabba, G. Cao, J. Magn. and Magn. Mater. 202, 119 (1999)
  7. “Raman Scattering Study of the Charge and Spin Dynamics of the Layered Ruthenium Oxide Ca3Ru2O7”, H.L. Liu, S. Yoon, S.L. Cooper and G. Cao, Phys. Rev. B 60, R6980, (1999)
  8. “Magnetism and Non-linear Transport in “Badly” Conducting Ru and Ir Based Ternary Oxides”, R.P. Guertin, G. Cao, C.S. Alexander, S. McCall, J. Bolivar and J.E. Crow, p 489 in “Physical Phenomena at High Magnetic Fields III” ed. Z. Fisk, L. Gor’kov, and R. Schrieffer, World Scientific (Singapore, 1999)

1998

  1. “Weak Ferromagnetism, Metal-to-Nonmetal Transition and Negative Differential Resistivity in Single Crystal Sr2IrO4”, G. Cao, J. Bolivar, S. McCall, J.E. Crow, and R.P. Guertin, Phys. Rev. B 57, R 11039 (1998)
  2. “High-field Electron Spin Resonance of Cu1-xZnxGeO3”, A.K. Hassan, L.A. Pardi, G.B. Martins, G. Cao, and L-C. Brunnel, Phys. Rev. Lett. 80, 1984 (1998)
  3. “Magnetic Properties of Single Crystal Ca3Ru2O7 in Ultra-high Magnetic Fields”, S. McCall, G. Cao, J.E. Crow and R.P. Guertin, Physica B 246, 144 (1998)
  4. “Thermal Conductivity of Sr1-xCaxRuO3”, M. Shepard, P.F. Henning, G. Cao, J.E. Crow, and R.P. Guertin, J. Appl. Phys83, 6989 (1998)
  5. “Metamagnetism of Single Crystal Ca3Ru2O7 in High Magnetic Fields”, G. Cao, J.E. Crow, S. McCall, R.P. Guertin, N. Harrison, C. Mielke, and A. Lacerda, B Physica B 246-247 144 (1998)
  6. “Magnetic Transition and Oxygen Content of Ca3Ru2O7”, S. McCall S, G. Cao, and J.E. Crow, J of Appl. Phys. 83, 6992 (1998)
  7. “Layered Ruthenium Oxides: From Band Metal to Mott Insulator”, A.V. Puchkov, M.C. Schabel, D.N Basov, T. Startseva, G. Cao, T. Timusk, and Z.-X. Shen, Phys. Rev. Lett. 81, 2747 (1998)
  8. “Electronic Band Structure of Sr3Ru2O7”, A.V. Puchkov, Z.X Shen, and G. Cao, Phys. Rev. B 58, 6671 (1998)
  9. “Negative Differential Resistivity in Ca3Ru2O7: Unusual Transport and Magnetic Coupling in a Near-Metallic System”, R.P. Guertin, J. Bolivar, G. Cao, S. McCall, and J.E. Crow, Solid State Comm. 107, 263 (1998)
  10. “(Sr1-xCax)3Ru2O7 System: Optical and ARPES Results”, A.V. Puchkov, M.C. Schabel, D.N. Basov, T. Startseva, G. Cao, T. Timusk, and Z.-X. Shen, J. Phys. Chem Solids, 59, 1907 (1998)            
  11. “High Field ESR Study of TDAE-C60 Powder at Different Larmor Frequencies”, A.L. Maniero, L. Pasimeni, LC. Brunnel, G. Cao, and R.P. Guertin, Solid State Comm. 106, 727 (1998)

1997

  1. “Observation of a Metallic Antiferroamgnetic Phase and Metal-Nonmetal Transition in Ca3Ru2O7”, G. Cao, S. McCall, J.E. Crow and R.P. Guertin, Phys. Rev. Lett. 78, 1751 (1997)
  2. “Thermal, Magnetic and Transport Properties of Single Crystal Sr1-xCaxRuO3 (0 £ x£ 1.0)”, G. Cao, S. McCall, M. Shepard, J. E. Crow, and R. P. Guertin, Phys. Rev. B 56, 321 (1997)
  3. “Magnetic and Transport Properties of Single Crystal Ca2RuO4: Relationship to Superconducting Sr2RuO4”, G. Cao, S. McCall, M. Shepard, J.E. Crow and R.P. Guertin, Phys. Rev. B 56, R2916 (1997)
  4. “Thermodynamic Properties of Peroviskite ARuO3 (A=Ca, Sr, and Ba) Single Crystals”, M. Shepard, S. McCall, G. Cao, J.E. Crow, J. Appl. Phys81, 4978 (1997).
  5. “Itinerant-to-Localized Electron Transition Perovskite CaRu1-x RhxO3”, G. Cao, F. Freibert, and L.E. Crow, J. Appl. Phys. 81, 3884 (1997)
  6. “Observation of Itinerant Ferromagnetism in Sr3Ru2O7 Single Crystals”, G. Cao, S. McCall, and J.E. Crow, Phys. Rev. B 55, R672 (1997).
  7. “Observation of Pr Magnetic Order in PrBa2Cu3O7”, S. Skanthakumar, J.W. Lynn, N. Rosov, G. Cao, and J.E. Crow, Phys. Rev. B 55, R3406 (1997)
  8. “Multiple Magnetic Phase Transitions in Single Crystal (Sr1-xCax)3Ru2O7 (0 £ x£ 1.0)”, G. Cao, S. McCall, J. E. Crow, and R. P. Guertin, Phys. Rev. B 56, 5387 (1997)
  9. “Ferromagnetism in Sr4Ru3O10: Relationship to Other Layered Metallic Oxides”, G. Cao, S.K. McCall, J.E. Crow and R.P. Guertin, Phys. Rev. B 56, R5740 (1997)

1996

  1. “Observation of an Anomalous Quasi-One-Dimensional Behavior in Na2Ru4O9 Single Crystals”, G. Cao, S. McCall, M. Shepard, and J. E. Crow, Phys. Rev. B 53, 12215 (1996)
  2. “Itinerant-to-Localized Electron Transition in Peroviskites CaRu1-xSnxO3 and SrRu1-xPbxO3”, G. Cao, S. McCall, J. Bolivar, M. Shepard, F. Freibert J.E. Crow, Phys. Rev. B 54, 15144 (1996)
  3. “Anisotropy of Thermal Conductivity in Selectively Doped YBCO”, P. Henning, G. Cao, J.E. Crow, Proceedings of the 10th Anniversary HTS Workshop edited by Batlogg, Chu, Chu, Gubser, and Muller (World Scientific/Singapore), 326, 1996
  4. “Spectroscopic Detection of Magnetic Phase Transition in BaPrO3”, M.N. Popova, S.A. Klimin, S.A. Golubchik, G. Cao, J.E. Crow, Phys. Lett. A 211, 242 (1996)
  5. “Crystal field and spectrum of Pr4+ in BaPrO3”, M. N. Popova, S. A. Klimin, B. Z. Malkin, L. A. Kasatkina, G. Cao and J. Crow, Phys. Lett. A 223, 308 (1996)
  6. “Anomalous Low Dimensional System: Study of Magnetism and Electrical Conductivity in Na2Ru4O9 ”, G. Cao, S. McCall, F. Freibert, M. Shepard, P. Henning, and J.E. Crow, J. Appl. Phys. 79, 4567 (1996)
  7. “Magnetic and Transport Properties of Na Doped SrRuO3 and CaRuO3”, M. Shepard, G. Cao, S. McCall, F. Freibert, and J.E. Crow, J. Appl. Phys. 79, 4821 (1996)
  8. “Effect of Pr, Tb and Zn Doping into YBa2Cu3O7 on Magnetoresistivity and Magnetic Phase Boundaries”, F. Freibert, G. Cao, S. McCall, M. Shepard, and J.E. Crow, J. Appl. Phys. 79, 5876 (1996)
  9. “Magnetic Properties of a High TC Superconductivity Related System Y1-xPrxBa2Fe3O8,” T. Yuen, M. Seyedahmadian, R.E. Salomon, and G.H. Myer, G. Cao, J. Appl. Phys. 79, 6001 (1996)
  10. "Upper Critical Field and Irreversibility in the (H,T) Plane for Y1-x(Pr,Tb)xBa2Cu3O7 and YBa2(Cu1-xZnx)3O7 Thin Films and Single Crystals", F. Freibert, G. Cao, J.E. Crow, M. Shepard, and S. McCall, J. Superconductivity 8,   619 (1996)
  11. "A Simultaneous Polarization and Magnetization Ordering in Some Insulating Cuprates", G. Cao, J. Bolivar, J.E. Crow, J. Superconductivity 8, 607 (1996)
  12. "Transport and Thermodynamic Studies of Y1-xTbxBa2Cu3O7", G.  Cao, S.  McCall, F. Freibert, M. Shepard, J.E. Crow, and Bohdan Andraka, J. Superconductivity 8, 669 (1996)

1995 and Before

  1. "Evidence of Unusual Hybridization: Electrical Resistivity and Specific Heat of Y1-xTbxBa2Cu3O7 Single Crystals", G. Cao, S. McCall, F. Freibert, M. Shepard, P. Henning, J.E. Crow, and Bohdan Andraka, Phys. Rev. B 52, 71 (1995)
  2. "Anomalous Magnetic Properties of Tb Doped YBa2Cu3O7 Single Crystals", G. Cao, F. Freibert, P.F. Henning, Scott MaCall, M. Shepard, and J.E. Crow, Physica B 206-207, 749 (1995)
  3. “A Simultaneous Polarization and Magnetization Ordering in Some Insulating Cuprates Oxides", G. Cao, J.E. Crow, and L.R. Testardi, Physica B 206-207, 760 (1995)
  4. "Thermal-conductivity of Zn, Pr and Tb doped YBCO single crystals -Theory and Experiment”, P. Henning, G. Cao, J.E. Crow, W.O. Putikka, and P.J. Hirschfeld, J. Superconductivity 8, 453 (1995)
  5. “Magneto-Resistivity and Magnetic Phase Boundaries in Selectively Doped YBa2Cu3O7”, F. Freibert, G. Cao, S. McCall, M. Shepard, and J. E. Crow, Proceedings of Physical Phenomena at High Magnetic Fields II, edited by Zackary Fisk, Lev Gor’kov, David Meltzer, and Robert Schrieffer (World Scentiifc/Singapore), 499, 1995
  6. “Unusual Magnetic and Transport Properties of Tb Doped YBa2Cu3O7 Single Crystals and Epitaxial Thin Films”, G. Cao, J.W. O'Reilly, J.E. Crow, and D. Nichols, J. Appl. Phys. 75, 6328 (1994)
  7. “Magnetic Ordering and Electric Polarizability of Zn Doped La2CuO4+d Single Crystals", G. Cao, J.W. O'Reilly, J.E. Crow and L.R. Testardi, J. Appl. Phys. 75, 6595 (1994) 
  8. “Enhanced Electric Polarizability at Magnetic Ordering Temperature of La2CuO4+x”, G. Cao, J.W. O'Reilly, J.E. Crow, and L.R. Testardi, Phys. Rev. B 47, 11510 (1993)
  9. "High Dielectric Permittivity of Ceramic and Single Crystal PrBa2Cu3Ox", P. Mazzara, S. Skirus, G. Cao, J.W. O'Reilly, J.E.  Crow, and L.R. Testardi, Phys. Rev. B 47, 8119 (1993)
  10. "Evidence of Hole Filling in Y1-xPrxBa2Cu3O7-x and Nd1-x CexBa2Cu3O7-x Thin Films", G. Cao, J. Bolivar, J.W. O'Reilly, J.E. Crow, R.J. Kennedy, and P. Pernambuco-Wise, Physica B 186-188, 1004 (1993)
  11. "Superconductivity in Tb Doped YBa2Cu3O7-x Single Crystals and Thin Films", G.Cao, R.J. Kennedy, J.W. O'Reilly, J.E. Crow, P. Pernambuco-Wise, and S.T. Ting, Physica B 186-188, 1022 (1993)
  12. "Antiferromagnetic Ordering of BaPrO3 Via Neutron Diffraction", N. Rosov, J.W. Lynn, Q. Lin, G. Cao, J.W. O'Reilly, P.P. Wise, and J.E. Crow, Phys. Rev. B 45, 982 (1992)
  13. "Magnetic Ordering of the Cu Spins in PrBa2Cu3O6+x", Rosov, J.W. Lynn, G. Cao, J.W. O'Reilly, P.P. Wise, and J.E. Crow, Physica C 204, 171 (1992)
  14. "Magnetic Properties of Some Tetravalent Rare Earth Perovskites", J.B. Bulman, M.V. Kuric, R.P. Guertin, S. Foner, E.J. McNiff, Jr., G. Cao, J.W. O'reilly, J.E. Crow, P.P. Wise, and T. Yuen.  J. Appl. Phys. 69, 4874 (1991)
  15. "Magnetic Properties of 'Perovskite' BaPrO3", G. Cao, P.P. Wise, J.W. O'Reilly, J.E. Crow, M.V. Kuric, and R.P. Guertin. J. Appl. Phys. 70, 6332 (1991)
  16. "X-ray-absorption Studies of Nd2-xCexCuO4", A. Krol, C.S. Lin, Z.H. Ming, C.J. Sher, Y.H. Kao, C.L. Lin, S.L. Qiu, J. Chen, J.M. Tranquada, M. Strongin, G.C. Smith, Y.K. Tao, R.L. Meng, P.H. Hor, C.W. Chu, G. Cao, and J.E. Crow.  Phys. Rev. B 42, 4763 (1990)  
  17. “Photoemission and Oxygen K-edge Absorption Studies of Ba(Pb,Bi)O3", C.L. Lin, S.L. Qiu, J. Chen, M. Strongin, G.  Cao, C.S. Jee, and J.E. Crow.  Phys. Rev. B 39, 9607 (1989)