Publications

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Most Recent Publications and Submissions

• Time-hidden magnetic order in a multi-orbital Mott insulator.  Wei Li, Iliya Esin, Youngjoon Han, Yincheng Liu, Hengdi Zhao, Honglie Ning, Cora Barrett, Jun-Yi Shan, Kyle Seyler, Gang Cao, Gil Refael, David Hsieh. Nat. Phys. (2025).
• Tunable magnons of an antiferromagnetic Mott insulator via interfacial metal-insulator transitions. Ambrose Seo, Sujan Shrestha, Maryam Souri, Christopher Dietl, Ekaterina M. Pärschke, Maximilian Krautloher, Gabriel Calderon Ortiz, Matteo Minola, Xiaotong Shi, Alexander Boris, Jinwoo Hwang, Giniyat Khaliullin, Gang Cao, Bernhard Keimer, Jong-Woo Kim, and Jung Ho Kim. Nature Communications 2025 (in press).
• Layer-dependent spin-resolved electronic structure of ferromagnetic triple-layered ruthenate Sr₄Ru₃O₁₀.  Prosper Ngabonziza, Jonathan D. Denlinger, Alexei V. Fedorov, Gang Cao, J. W. Allen, G. Gebreyesus , and Richard M. Martin. Phys. Rev B 111, 115146 (2025). Editors’ Suggestion
• Relationship between spinons and magnetic fields in a fractionalized state, Yu Zhang, Hengdi Zhao, Tristan R. Cao, Rahul Nandkishore, Pedro Schlottmann, Lance E. DeLong and Gang Cao, 2024. https://arxiv.org/abs/2408.13665
• Transition between heavy-fermion-strange-metal and spin liquid in a 4d-electron trimer lattice, Hengdi Zhao, Yu Zhang, Pedro Schlottmann, Rahul Nandkishore, Lance DeLong and Gang Cao, Phys. Rev. Lett. 132, 226503 (2024); Editors’ Suggestion. https://doi.org/10.1103/PhysRevLett.132.226503                                                                                                                                                                                                                                                      
• Current-sensitive Hall effect in a chiral-orbital-current state, Yu Zhang, Yifei Ni, Pedro Schlottmann, Rahul Nandkishore, Lance E. DeLong, and Gang Cao, Nature Communications 15, 3579 (2024). https://doi.org/10.1038/s41467-024-47823-2                                                                                                                                        
• Evidence for bootstrap percolation dynamics in a photoinduced phase transition, Tyler Carbin, Xinshu Zhang, Adrian B. Culver, Hengdi Zhao, Alfred Zong, Rishi Acharya, Cecilia J. Abbamonte, Rahul Roy, Gang Cao, and Anshul Kogar, Phys. Rev. Lett. 130, 186902 (2023)
• Stabilization of collinear ferromagnetic order in Ir-doped triple-layer ruthenate Sr₄Ru₃O₁₀, Feng Ye,  Zachary Morgan, Yu Zhang,  Yifei Ni, and G. Cao, Phys. Rev. B 108, L241109 (2023); Editors’ Suggestion
• Control of chiral orbital currents in a colossal magnetoresistance material, Yu Zhang, Yifei Ni, Hengdi Zhao, Sami Hakani, Feng Ye, Lance DeLong, Itamar Kimchi and Gang Cao, Nature 611, 467–472 (2022)                                                                                                                                   
• Emergence of spinons in layered trimer iridate Ba₄Ir₃O₁₀,Y. Shen, J. Sears, G. Fabbris, A. Weichselbaum, W. Yin, H. Zhao, D. G. Mazzone, H. Miao, M. H. Upton, D. Casa, R. S. Acevedo-Esteves, C. Nelson, A. M. Barbour, C. Mazzoli, G. Cao, and M. P. M. Dean, Phys. Rev. Lett.129, 207201 (2022)          

Monographs

Physics of Spin-Orbit-Coupled Oxides,  Gang Cao and Lance E. DeLong, Oxford University Press, ISBN 978-0-19-960202-5; 2021                                                                                         

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

 Selected Publications (out of 280)

1. Evidence for bootstrap percolation dynamics in a photoinduced phase transition, Tyler Carbin, Xinshu Zhang, Adrian B. Culver, Hengdi Zhao, Alfred Zong, Rishi Acharya, Cecilia J. Abbamonte, Rahul Roy, Gang Cao, and Anshul Kogar, Phys. Rev. Lett. 130, 186902 (2023)
2. Control of chiral orbital currents in a colossal magnetoresistance material, Yu Zhang, Yifei Ni, Hengdi Zhao, Sami Hakani, Feng Ye, Lance DeLong, Itamar Kimchi and Gang Cao, Nature 611, 467–472 (2022)
3. Stabilization of collinear ferromagnetic order in Ir-doped triple-layer ruthenate Sr4Ru3O10, Feng Ye,  Zachary Morgan, Yu Zhang,  Yifei Ni, and G. Cao, Phys. Rev. B 108, L241109 (2023); Editors’ Suggestion
4. Emergence of spinons in layered trimer iridate Ba₄Ir₃O₁₀,Y. Shen, J. Sears, G. Fabbris, A. Weichselbaum, W. Yin, H. Zhao, D. G. Mazzone, H. Miao, M. H. Upton, D. Casa, R. S. Acevedo-Esteves, C. Nelson, A. M. Barbour, C. Mazzoli, G. Cao, and M. P. M. Dean, Phys. Rev. Lett.129, 207201 (2022)
5. A coherent phonon-induced hidden quadrupolar ordered state in Ca2RuO4, Honglie Ning, Omar Mehio, Xinwei Li, Michael Buchhold, Mathias Driesse, Hengdi Zhao, Gang Cao  and David Hsieh, Nature Communications 14,8258 (2023)
6. Keldysh space control of charge dynamics in a strongly driven Mott insulator, Xinwei Li, Honglie Ning, Omar Mehio, Hengdi Zhao, Min-Cheol Lee, Kyungwan Kim, Fumihiko Nakamura, Yoshiteru Maeno, Gang Cao, and David Hsieh, Phys. Rev. Lett. 128, 187402 (2022)
7. Mechanical control of physical properties in the van der Waals ferromagnet Cr₂Ge₂Te₆ via application of electric current, Hengdi Zhao, Yifei Ni, Bing Hu, Sabastian Selter, Saicharan Aswartham, Yu Zhang, Bernd Buchner, Pedro Schlottmann, and Gang Cao, Phys. Rev. B 106, L041103 (2022)
8. Magnetic structure and spin fluctuations in the colossal magnetoresistance ferrimagnet Mn₃Si₂Te₆, Feng Ye, Masaaki Matsuda, Zachary Morgan, Todd Sherline,Yifei Ni, Hengdi Zhao ,and G. Cao, Letter of Phys. Rev. B 106, L180402 (2022); Editors' Suggestion
9. Monograph: Physics of Spin-Orbit-Coupled Oxides,  Gang Cao and Lance E. DeLong, Oxford University Press, ISBN 978-0-19-960202-5; 2021
10. Colossal magnetoresistance via avoiding fully polarized magnetization in ferrimagnetic insulator Mn₃Si₂Te₆, Yifei Ni, Hengdi Zhao, Yu Zhang, Bing Hu, Itamar Kimchi and Gang Cao, Phys. Rev. B 103, L161105 (2021);Editors' Suggestion
11. Flexible lattice in Ca3Ru2O7: Control of the electrical transport via anisotropic magnetostriction, Hengdi Zhao, Hao Zheng, Jasminka Terzic, Wenhai Song, Yifei Ni, Yu Zhang, Pedro Schlottmann and Gang Cao, Phys. Rev. B 104, L121119 (2021)
12. The ground state in a proximity to a possible Kitaev spin liquid: An undistorted honeycomb iridate NaxIrO₃ (0.60 < x < 0.80), Hengdi Zhao, Bing Hu, Feng Ye, Minhyea Lee, Pedro Schlottmann and Gang Cao, Letter of Phys. Rev. B 104, L041108 (2021); Editors' Suggestion
13. Quest for quantum states via field-editing technology, Gang Cao, Hengdi Zhao, Bing Hu, Nicholas Pellatz, Dmitry Reznik, Pedro Schlottmann and Itamar Kimchi, npj Quantum Mater. 5, 83 (2020)
14. Quantum liquid from strange frustration in the trimer magnet Ba₄Ir₃O₁₀, G. Cao, H. D. Zhao, H. Zheng, Y. F. Ni, Christopher. A. Pocs, Y. Zhang, Feng, Ye, Christina Hoffmann, Xiaoping Wang, Minhyea Lee, Michael Hermele and Itamar Kimchi, npj Quantum Mater. 5, 26 (2020)
15. Topical Review: Towards electrical-current control of quantum states in spin-orbit-coupled matter, Gang Cao, Journal of Physics: Condensed Matter 32, 423001 (2020)  
16. Possible quantum paramagnetism in compressed Sr₂IrO₄, D. Haskel, G. Fabbris, J. H. Kim, L. S. I. Veiga, J. R. L. Mardegan, C. A. Escanhoela, Jr., S. Chikara, V. Struzhkin, T. Senthil, B. J. Kim, G. Cao, and J.W. Kim, Phys. Rev. Lett. 124, 067201 (2020)
17. Pseudospin-lattice coupling and electric control of the square-lattice iridate Sr₂IrO₄, Feng Ye, Christina Hoffmann, Wei Tian, Hao Zheng, Hengdi Zhao, and G. Cao, Phys. Rev. B 102, 115120 (2020)
18. Persistent insulating state at megabar pressures in strongly spin-orbit-coupled Sr₂IrO₄, Chunhua Chen, Yonghui Zhou, Xuliang Chen, Tao Han, Chao An, Ying Zhou, Yifang Yuan, Bowen Zhang, Shuyang Wang, Ranran Zhang, Lili Zhang, Changjing Zhang, Zhaorong Yang, Lance E. DeLong and Gang Cao, Phys. Rev. B 101, 144102 (2020)
19. Direct detection of dimer orbitals in Ba₅AlIr₂O₁₁, Y. Wang, Ruitang Wang, Jungho Kim, M. H. Upton, D. Casa, T. Gog, G. Cao, J. P. Hill, G. Kotliar,M. P. M. Dean,and X. Liu, Phys. Rev. Lett.,122, 106401 (2019)
20. Nonequilibrium orbital transitions via applied electrical current in calcium ruthenate, Hengdi Zhao, Bing Hu, Feng Ye, Christina Hoffmann, Itamar Kimchi and Gang Cao; Phys. Rev. B 100, 241104(R) (2019)
21. Electrical control of structural and physical properties via spin-orbit interactions in Sr₂IrO₄, G. Cao, J. Terzic, H. D. Zhao, H. Zheng, Peter Riseborough, L. E. DeLong, Phys. Rev. Lett. 120, 017201 (2018); Editors' Suggestion
22. Observation of a pressure-induced transition from interlayer ferromagnetism to intralayer antiferromagnetism in Sr₄Ru₃O₁₀, H . Zheng, W.H. Song, J. Terzic, H. D. Zhao, Y. Zhang, Y. F. Ni, L. E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. B 98, 064418 (2018); Editors' Suggestion
23. The Challenge of spin-orbit-tuned ground states in iridates: A Key Issues Review, Gang Cao and Pedro Schlottmann, Reports on Progress in Physics 81 042502 (2018)
24. “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)
25. 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)
26. Monograph: Frontiers of 4d- and 5d-Transition Metal Oxides, Gang Cao and Lance E. De Long, World Scientific, London, 2013; ISBN: 978-981-4374-859
27. Negative volume thermal expansion via orbital and magnetic orders in single-crystal Ca₂Ru_1-xCr_xO₄, T.F. Qi, O.B. Korneta, S. Parkin, L.E. DeLong, P. Schlottmann and G. Cao, Phys. Rev. Lett. 105, 177203 (2010)
28. Observation of strong spin valve effect in bulk Ca₃(Ru_1-xCr_x)₂O₇, G. Cao, V. Durairaj S. Chikara L. E. DeLong and P. Schlottmann, Phys. Rev. Lett. 100, 159902 (2008)
29. 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)
30. 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)
31. 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)
32. 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, R11039 (1998)
33. 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)
34. Thermal, magnetic and transport properties of single crystal Sr_1-xCa_xRuO₃ (0 < x < 1.0), G. Cao, S. McCall, M. Shepard, J. E. Crow, and R. P. Guertin, Phys. Rev. B 56, 321 (1997)
35. 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)