4001 Discovery Dr. Suite N366
Boulder CO 80309
2013 – 2018: Research Associate Faculty, Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO
2012 – 2013: Postdoctoral fellow, Department of Physics and Astronomy, Northwestern University, Evanston, IL
2007 – 2012: Ph. D. in Condensed Matter Physics, State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing, China
2003 – 2007: Bachelor of Science, Department of Physics, Peking University, Beijing, China
My research interest is theoretical condensed matter physics and nanoscience, special focus is on novel physical properties induced by spin-orbit coupling, topological insulators, strong correlation physics, electronic and structural properties of crystals, surfaces, and interfaces, low-dimensional systems and nano-materials, and electron transport through nanostructures.
- Novel physics induced by spin-orbit coupling, such as topological insulators, spin splittings (Rashba-type and Dresselhaus-type) and related electronic or optical properties.
- Atomic and electronic structure of crystals, defects, molecules and low-dimensional nanostructures, such as interfaces, heterostructures, graphene, silicene, carbon nanotube and transition-metal dichalcogenides.
- Novel electronic device simulation in nanoelectronics and spintronics, such as (spin-) field effect transistor, negative differential resistance, spin-filter, spin-valve, etc.
- Functionality-driven inverse material search, including quantum wells, superlattices by genetic algorithm.
- Quantum transport study under nano-scale by using non-equilibrium Green’s function method, including transmission spectrum, eigenstates, I-V curve, etc.
- Computational physics. Density-functional theory (DFT), pseudopotentials. Some skilled DFT codes like CASTEP, VASP, Dmole3, SIESTA, etc.
- Qihang is also enthusiastic about learning and exploring new research areas including energy efficient systems (e.g., solar cells), technologically and environmentally relevant materials, and intersection related materials (e.g., photonic crystals).
- Q. Liu* and A. Zunger, Predicted Realization of Cubic Dirac Fermion in Quasi-One-Dimensional Transition-Metal Mono-Chalcogenides, Phys. Rev. X 7, 021019 (2017).
- X. Zhou, Q. Liu*, J. A. Waugh, H. Li, T. Nummy, X. Zhang, X. Zhu, G. Cao, A. Zunger and D. S. Dessau. Predicted electronic markers for polytypes of LaOBiS2 examined via angular resolved photoemission spectroscopy, Phys. Rev. B 95, 075118 (2017).
- Q. Liu*, X. Zhang, J. A. Waugh, D. S. Dessau and A. Zunger. Orbital mapping of energy bands and the truncated spin polarization in three-dimensional Rashba semiconductors, Phys. Rev. B 94, 125207 (2016).
- Q. Liu*, X. Zhang and A. Zunger. Transforming common III-V and II-VI semiconductor compounds into topological heterostructures: The case of CdTe/InSb superlattices, Adv. Func. Mater. 26, 3259 (2016).
- Q. Liu*, X. Zhang and A. Zunger. Polytypism in LaOBiS2-type compounds based on different three-dimensional stacking sequences of two-dimensional BiS2 layers, Phys. Rev. B 93, 174119 (2016).
- Q. Liu*, X. Zhang and A. Zunger, Intrinsic circular polarization in centrosymmetric stacks of transition-metal dichalcogenides, Phys. Rev. Lett. 114, 087402 (2015).
- Q. Liu*, X. Zhang, L. B. Abdalla, A. Fazzio and A. Zunger, Switching a Normal Insulator into a Topological Insulator via Electric Field with Application to Phosphorene, Nano Lett. 15, 1222 (2015).
Q. Liu*, X. Zhang, H. Jin, K. Lam, J. Im, A. J. Freeman, et al. Search and design of nonmagnetic centrosymmetric layered crystals with large local spin polarization. Phys. Rev. B 91, 235204 (2015).
X. Zhang†, Q. Liu†, J.-W. Luo, A. J. Freeman, A. Zunger, Hidden spin polarization in inversion-symmetric bulk crystals, Nat. Phys. 10, 387 (2014).
- Q. Liu*, Y. Guo, A. J. Freeman, Tunable Rashba Effect in Two-dimensional LaOBiS2 Films: Ultra-thin Candidates for Spin Field Effect Transistors, Nano Lett. 13, 5264 (2013).
- Z. Ni, Q. Liu, K. Tang, J. Zheng, J. Zhou, R. Qin, Z. Gao, D. Yu and J. Lu, Tunable Bandgap in Silicene and Germanene, Nano Lett. 12, 113 (2012).
- Q. Liu†, L. Li†, Y. Li, Z. Gao, Z. Chen & J. Lu, Tuning Electronic Structure of Bilayer MoS2 by Vertical Electric Field: A First-Principles Investigation. J. Phys. Chem. C 116, 21556-21562 (2012).
Q. Liu, G. Luo, R. Qin, H. Li, X. Yan, C. Xu, et al. Negative differential resistance in parallel single-walled carbon nanotube contacts. Phys. Rev. B 83, 155442 (2011).
† Co-first author
* Corresponding author.
For a full list of publications please visit the Google Scholar site.