Kai Chang Lab

Low-Dimensional Quantum Materials - BAQIS

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Dr. Chong Liu
(刘充)

Associate Research Scientist 

E-mail: liuchong-at-baqis-dot-ac-dot-cn

ORCID; Web of Science;

‪Chong Liu – ‪Google Scholar

Experiences

  • 2009 – 2013 Bachelor. University of Science and Technology of China (中国科学技术大学), Hefei, China
  • 2013 – 2018 Ph.D. in Physics. Tsinghua University (清华大学), Beijing, China
  • 2018 – 2021 Postdoctoral Research Fellow. Quantum Matter Institute, The University of British Columbia, Vancouver, Canada
  • 2021 – Present Associate Research Scientist. Beijing Academy of Quantum Information Sciences, Beijing, China.

Research Interests

Chong Liu’s research interest is the preparation, investigation and manipulation of two-dimensional (2D) quantum materials, including unconventional superconducting thin films, 2D ferromagnetic materials and topological materials. The major experimental techniques are molecular beam epitaxy (MBE) and scanning tunneling microscopy (STM), as well as magnetoelectric transport, angle-resolved photoelectron spectroscopy (ARPES), X-ray spectroscopy. As of early 2025 over 30 papers have been published in journals such as Nature Communications, Nano Letters, etc., with a total of more than 1100 citations and the h-index of 15.

Publication

#Corresponding author, *Co-first author

  1. Jing-Rong Ji*, Zi’Ang Gao*, Shiva Prasad Poudel, Rui-Qi Cao, Tianzhe Chen, Luxin Li, Chong Liu#, Salvador Barraza-Lopez#, Stuart S. P. Parkin#, Kai Chang#, Surface Diffusion in SnTe-PbTe Monolayer Lateral Heterostructures. Advanced Functional Materials, 2026;0:e24380 https://doi.org/10.1002/adfm.202524380
  2. Xuesong Gai, Hao Xu, Yi Yang, Yifan Guo, Xinyue Wang, Ming-Liang Zhu, Peng Deng, Haicheng Lin, Kai Chang#, Chong Liu#, Modulation of Electronic Liquid-Crystal Phases by Local Strain in Few-Layer FeSe Films. Nano Letters 2025 25 (46), 16491-16498 https://doi.org/10.1021/acs.nanolett.5c04560
  3. C. Liu, B. A. Davidson, M. Zonno, S. Zhdanovich, R. Roemer, M. Michiardi, S. Gorovikov, G. Levy, A. Damascelli, and K. Zou#. Protection of air-sensitive two-dimensional van der Waals thin film materials by capping and decapping process. Synchrotron Radiation News 36, 24 (2023). https://www.tandfonline.com/doi/abs/10.1080/08940886.2023.2226047
  4. K. Zhu, H. Wang, Y. Zhu, Y. Zang, Y. Feng, B. Tong, D. Zhao, X. Xie, K. Chang, K. He#, and C. Liu#. Stoichiometric growth of monolayer FeSe superconducting films using a selenium cracking source. Crystals 12, 853 (2022). https://www.mdpi.com/2073-4352/12/6/853
  5. C. Liu#, K. Chang, and K. Zou. Realistic simulation of reflection high-energy electron diffraction patterns for two-dimensional lattices using Ewald construction. Journal of Vacuum Science & Technology B 40, 054002 (2022).
  6. Kai Chang#*, Jing-Rong Ji*, Zi’Ang Gao*, Angiolo Huamán, Rui-Qi Cao, Wen-Lin Wang, Chengguang Yue, Salvador Barraza-Lopez#, Chong Liu, Stuart S. P. Parkin#, Ferroelectrically Switched Valley-Dependent Transmission in SnTe-PbTe-SnTe Monolayer Lateral Heterostructures. Nat. Comm. (2025) 16:11063 https://doi.org/10.1038/s41467-025-66005-2
  7. H. Shin, C. Liu, S. Godin, F. Li, R. Sutarto, B. A. Davidson, and K. Zou#. Highly tunable ferromagnetic 2D electron gases at oxide interfaces. Advanced Materials Interfaces 9, 2201475 (2022). https://advanced.onlinelibrary.wiley.com/doi/10.1002/admi.202201475
  8. C. Liu, R. P. Day, F. Li#, R. L. Roemer, S. Zhdanovich, S. Gorovikov, T. M. Pedersen, J. Jiang, S. Lee, M. Schneider, D. Wong, P. Dosanjh, F. J. Walker, C. H. Ahn, G. Levy, A. Damascelli, G. A. Sawatzky, and K. Zou#. High-order replica bands in monolayer FeSe/SrTiO3 revealed by polarization-dependent photoemission spectroscopy. Nature Communications 12, 4573 (2021). https://www.nature.com/articles/s41467-021-24783-5
  9. C. Liu#*, H. Shin*, A. Doll, H.-H. Kung, R. P. Day, B. A. Davidson, J. Dreiser, G. Levy, A. Damascelli, C. Piamonteze, and K. Zou*. High-temperature superconductivity and its robustness against magnetic polarization in monolayer FeSe on EuTiO3. npj Quantum Materials 6, 85 (2021). https://www.nature.com/articles/s41535-021-00388-5
  10. Y. Liu, S. Qi, J. Fang, J. Sun, C. Liu, Y. Liu, J. Qi, Y. Xing, H. Liu#, X. Lin, L. Wang, Q.-K. Xue, X. C. Xie, and J. Wang#. Observation of in-plane quantum Griffiths singularity in two-dimensional crystalline superconductors. Physical Review Letters 127, 137001. https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.137001
  11. F. Li#, Y. Zou, M.-G. Han, K. Foyevtsova, H. Shin, S. Lee, C. Liu, K. Shin, S. D. Albright, R. Sutarto, F. He, B. A. Davidson, F. J. Walker, C. H. Ahn, Y. Zhu, Z. G. Cheng, I. Elfimov, G. A. Sawatzky#, and K. Zou#. Single-crystalline epitaxial TiO film: A metal and superconductor, similar to Ti metal. Science Advances 7, eabd4248 (2021). https://www.science.org/doi/10.1126/sciadv.abd4248
  12. C. Liu and K. Zou#. Tuning stoichiometry and its impact on superconductivity of monolayer and multilayer FeSe on SrTiO3. Physical Review B 101, 140502(R) (2020). https://journals.aps.org/prb/abstract/10.1103/PhysRevB.101.140502
  13. Y. Liu*, Y. Xu*, J. Sun*, C. Liu*, Y. Liu, C. Wang, Z. Zhang, K. Gu, Y. Tang, C. Ding, H. Liu, H. Yao, X. Lin#, L. Wang#, Q.-K. Xue, and J. Wang#. Type-II Ising superconductivity and anomalous metallic state in macro-size ambient-stable ultrathin crystalline films. Nano Letters 20, 5728 (2020). https://pubs.acs.org/doi/10.1021/acs.nanolett.0c01356
  14. H. Shin#, C. Liu, F. Li, R. Sutarto, B. A. Davidson, and K. Zou#. Controlling the electrical and magnetic ground states by doping in the complete phase diagram of titanate Eu1−xLaxTiO3 thin films. Physical Review B 101, 214105 (2020). https://journals.aps.org/prb/abstract/10.1103/PhysRevB.101.214105
  15. R. Roemer, C. Liu, and K. Zou#. Robust ferromagnetism in wafer-scale monolayer and multilayer Fe3GeTe2. npj 2D Materials and Applications 4, 33 (2020). https://www.nature.com/articles/s41699-020-00167-z
  16. C. Liu, F. Zheng, L. Shen, M. Liao, R. Wu, G. Gong, C. Ding, H. Yang, W. Li, C.-L. Song, K. He, X.-C. Ma, D. Zhang, L. Yang, P. Zhang, L. Wang#, and Q.-K. Xue#. Anti-PbO-type CoSe film: a possible analog to FeSe superconductors. Superconductor Science and Technology 31, 115011 (2018). https://iopscience.iop.org/article/10.1088/1361-6668/aae146
  17. C. Liu, H. Yang, C.-L. Song, W. Li, K. He, X.-C. Ma, L. Wang#, and Q.-K. Xue#. Observation of tunneling gap in epitaxial ultrathin films of pyrite-type copper disulfide. Chinese Physics Letters 35, 027303 (2018). https://iopscience.iop.org/article/10.1088/0256-307X/35/2/027303
  18. C. Liu, J. Mao, H. Ding, R. Wu, C. Tang, F. Li, K. He, W. Li, C.-L. Song, X.-C. Ma, Z. Liu#, L. Wang#, and Q.-K. Xue#. Extensive impurity-scattering study on the pairing symmetry of monolayer FeSe films on SrTiO3. Physical Review B 97, 024502 (2018). https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.024502
  19. C. Liu, C.-S. Lian, M.-H. Liao, Y. Wang, Y. Zhong, C. Ding, W. Li, C.-L. Song, K. He, X.-C. Ma, W. Duan, D. Zhang, Y. Xu, L. Wang#, and Q.-K. Xue#. Two-dimensional superconductivity and topological states in PdTe2 thin films. Physical Review Materials 2, 094001 (2018). https://doi.org/10.1103/PhysRevMaterials.2.094001
  20. L. Shen, C. Liu, F. W. Zheng, X. Xu, Y. J. Chen, S. C. Sun, L. Kang, Z. K. Liu, Q. K. Xue, L. L. Wang, Y. L. Chen#, and L. X. Yang#. Evolution of electronic structure and electron-phonon coupling in ultrathin tetragonal CoSe films. Physical Review Materials 2, 114005 (2018). https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.2.114005
  21. G. Zhou#, D. Zhang#, C. Liu#, C. Tang, X. Wang, Z. Li, C. Song, S. Ji, K. He, L. Wang#, X. Ma, and Q.-K. Xue#. Interface induced high temperature superconductivity in single unit-cell FeSe on SrTiO3(110). Applied Physics Letters 108, 202603 (2016). https://doi.org/10.1063/1.4950964
  22. Z. F. Wang*, H. Zhang*, D. Liu, C. Liu, C. Tang, C. Song, Y. Zhong, J. Peng, F. Li, C. Nie, L. Wang, X. J. Zhou#, X. Ma#, Q. K. Xue, and F. Liu#. Topological edge states in a high-temperature superconductor FeSe/SrTiO3(001) film. Nature Materials 15, 968 (2016). https://www.nature.com/articles/nmat4686
  23. C. Tang*, C. Liu*, G. Zhou, F. Li, H. Ding, Z. Li, D. Zhang, Z. Li, C. Song, S. Ji, K. He, L. Wang#, X. Ma, and Q.-K. Xue#. Interface-enhanced electron-phonon coupling and high-temperature superconductivity in potassium-coated ultrathin FeSe films on SrTiO3. Physical Review B 93, 020507(R) (2016). https://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.020507

Funding

  1. Study on charge and spin orderings in monolayer FeSe by scanning tunneling microscopy, National Natural Science Foundation of China (Youth Program).

Openning Positions

Currently accepting applications for PhD candidates.

     Address: Building #3, West Area, No.10 Xi-bei-wang East Road, Haidian District, Beijing 100193, P.R. CHINA.