Liu ZhengXin-中国人民大学物理学院

Theoretical Physics (Condensed Matter)

Liu ZhengXinProfessor

Address：Room 405B, Physics Building

E-mail：liuzxphys@ruc.edu.cn

Phone：62510581

Fax：

Webpage：

Education

PhD (2007–2010): Department of Physics, The Hong Kong University of Science and Technology

Master (2004–2007): Theoretical Physics Laboratory, Chern Institute of Mathematics, Nankai University

Bachelor (1998–2004): College of Physical Science, Nankai University

Work Experience

Associate Professor and Professor, School of Physics, Renmin University of China (September 2015 – Present)

Visiting Scholar, Perimeter Institute for Theoretical Physics, Canada (November 2013 – February 2014; March – April 2015)

Associate Researcher, Institute for Advanced Study, Tsinghua University (October 2012 – September 2015)

Visiting Scholar, Department of Physics, Massachusetts Institute of Technology (MIT) (March – May 2011; February – May 2012)

Postdoctoral Researcher, Institute for Advanced Study, Tsinghua University [awarded "Chen-Ning Yang Young Scholar Award"] (October 2010 – October 2012)

Research Interests

Low-dimensional frustrated quantum magnetic systems, including quantum spin liquids and phase transitions of magnetic ordered phases, low-energy effective theories, dynamic and transport behaviors, etc.;

Topological states of matter and their physical properties in magnetic topological semimetals and periodic magnetic structures; Topological order, symmetry-protected topological order, and topological quantum computing, including classification studies, model realization, numerical simulation, and potential applications; Excitation spectra in nodal (line) superconductors, mechanisms of unconventional superconductivity, etc.; Quantum many-body algorithms, including variational Monte Carlo methods, tensor renormalization group methods, etc.

Research Projects

5. Key Program of the National Natural Science Foundation of China (NSFC), *Quantum Confinement and Deconfinement in Strong Spin-Orbit Coupled Spin Liquid Materials* (1***4020), January 2022 – December 2026, Participant (Core Member)

4. General Program of NSFC, *Theoretical Study of Spin Liquid Phases on Hexagonal Lattices* (11974421), January 2020 – December 2023, Principal Investigator 3. General Program of NSFC, *Novel Quantum States in Spin Models* (11574392), January 2016 – December 2019, Principal Investigator

2. National Key Research and Development Program, *Research on Novel Quantum Effects and Regulation in Quantum Spin-Frustrated Systems and Spin Liquids*, July 2016 – June 2021, Participant

1. Young Scientists Fund Project of NSFC, *Quantum Magnetism in Large-Spin Antiferromagnetic Systems* (11204149), January 2013 – December 2015, Principal Investigator

A

Main Research Achievements in the Past Five Years

18，Peng-Jie Guo*, Yi-Wen Wei, Kai Liu, Zheng-Xin Liu*, and Zhong-Yi Lu, Eightfold Degenerate Fermions in Two Dimensions, Phys. Rev. Lett. 127, 176401 (2021);

17，Qi-Rong Zhao, and Zheng-Xin Liu*, Thermal Properties and Instability of a U(1) Spin Liquid on the Triangular Lattice, Phys. Rev. Lett. 127, 127205 (2021);

16, Han Li, Hao-Kai Zhang, Jiucai Wang, Han-Qing Wu,Yuan Gao, Dai-Wei Qu, Zheng-Xin Liu^*, Shou-Shu Gong^*, and Wei Li^*, Identification of Magnetic Interactions and High-field Quantum Spin Liquid in α-RuCl₃, Nat. Commun. 12, 4007 (2021);

15, Su-Ming Zhang, and Zheng-Xin Liu*, Phase diagram for Hole-Doped Kitaev System on the Honeycomb Lattice, Phys. Rev. B, 104, 115108 (2021);

14, Jian Yang, Chen Fang, and Zheng-Xin Liu^*, Symmetry-protected Nodal Points and Nodal Lines in Magnetic Materials, Phys. Rev. B 103, 245141 (2021);

13, Zhen-Yuan Yang, Jian Yang, Chen Fang, and Zheng-Xin Liu^*, A Hamiltonian Approach for Obtaining Irreducible Projective Representations and the k·p Perturbation for Anti- unitary Symmetry Groups, J. Phys. A: Math. Theor. 54, 265202 (2021);

12, Jiucai Wang, Qirong Zhao, Xiaoqun Wang^*, Zheng-Xin Liu^*, Multinode quantum spin liquids on the honeycomb lattice, Phys. Rev. B 102, 144427 (2020);

11, Jiucai Wang, Zheng-Xin Liu^*, Symmetry-protected gapless spin liquids on the strained honeycomb lattice, Phys. Rev. B, 102, 094416 (2020);

10, Shang-Qiang Ning, Zheng-Xin Liu^*, Hong-Chen Jiang^*, Topological superconductivity by doping symmetry-protected topological states, Phys. Rev. Research 2, 023184(2020);

9, Jiucai Wang, B. Normand, Zheng-Xin Liu^*, One Proximate Kitaev Spin Liquid in the K-J-Γ Model on the Honeycomb Lattice, Phys. Rev. Lett. 123, 197201(2019);

8, Zheng-Xin Liu, Hong-Hao Tu, Ying-Hai Wu, Rong-Qiang He, Xiong-Jun Liu, Yi Zhou, Tai-Kai Ng, Non-Abelian Chiral Spin Liquid on the Kagome Lattice, Phys. Rev. B 97, 195158 (2018);

7, Zheng-Xin Liu, Bruce Normand, Dirac and Chiral Quantum Spin Liquids on the Hon- eycomb Lattice in a Magnetic Field, Phys. Rev. Lett. 120, 187201 (2018);

6, Jian Yang, Zheng-Xin Liu^*, Irreducible projective representations and their physical applications, J. Phys. A: Math. Theor. 51, 025207 (2018);

5, Xiaofan Zhou, Jian-Song Pan, Zheng-Xin Liu^*, Wei Zhang^*, Wei Yi^*, Gang Chen^*, Suotang Jia, Symmetry-Protected Topological States for Interacting Fermions in Alkaline-Earth- Like Atoms, Phys. Rev. Lett. 119, 185701 (2017);

4, Jiacheng Zheng, Kejing Ran, Tianrun Li, Jinghui Wang, Pengshuai Wang, Bin Liu, Zheng-Xin Liu, B. Normand, Jinsheng Wen, Weiqiang Yu^*, Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α-RuCl₃, Phys. Rev. Lett. 119, 227208 (2017);

3, Ying-Hai Wu^*,Tao Shi, G. J. Sreejith, Zheng-Xin Liu^*, Fermionic symmetry-protected topological state in strained graphene, Phys. Rev. B 94, 245120 (2017);

2, Shang-Qiang Ning, Zheng-Xin Liu, Peng Ye^*, Symmetry Enrichment in Three-Dimensional Topological Phases, Phys. Rev. B 94, 245120 (2016);

1, Ji-Yao Chen, Zhengfeng Ji, Zheng-Xin Liu, Xiaofei Qi, Nengkun Yu, Bei Zeng, Duanlu Zhou, Physical origins of ruled surfaces on the reduced density matrices geometry, Science China, physics, Mechanics & Astronomy 60, 020311 (2016);

Representative Works over Five Years

12, Ji-Yao Chen, Zheng-Xin Liu, Symmetry protected topological phases in spin-1 ladders and their phase transitions, Annals of Physics, 551 (2015);
11, Shang-Qiang Ning, Hong-Chen Jiang^*, Zheng-Xin Liu^*, Fermionic Symmetry Protected Topological Phase Induced by Interactions, Phys. Rev. B 91, 241105(R) (2015);
10, Zheng-Xin Liu, Jia-Wei Mei, Peng Ye, Xiao-Gang Wen, U (1)×U (1) Symmetry Protected Topological Order in Gutzwiller Wave Functions, Phys. Rev. B 90, 235146 (2014);
9, Zheng-Xin Liu, Zheng-Cheng Gu, Xiao-Gang Wen, Microscopic Realization of two-Dimensional Bosonic Topological Insulators, Phys. Rev. Lett. 113, 267206 (2014);
8, Wei Li, Shuo Yang, Meng Cheng, Zheng-Xin Liu, Hong-Hao Tu, Topology and Criticality in Resonating AKLT-loop Spin Liquid States, Phys. Rev. B 89, 174411 (2014);
7, Zheng-Xin Liu^*, Yi Zhou, Tai-Kai Ng, Gutzwiller Approach for Elementary Excitations in S=1 Antiferromagnetic Chains, New J. Phys. 16, 083031 (2014);
6, Xiong-Jun Liu, Zheng-Xin Liu, Meng Cheng, Manipulating Topological Edge Spins in One-Dimensional Optical Lattice, Phys. Rev. Lett. 110, 076401 (2013);
5, Zheng-Xin Liu, Xiao-Gang Wen, Symmetry protected Spin Quantum Hall phases in two Dimensions, Phys. Rev. Lett. 110, 067205 (2013);
4, Xie Chen, Zheng-Cheng Gu, Zheng-Xin Liu, Xiao-Gang Wen, Symmetry protected topological orders and the cohomology class of their symmetry group, Phys. Rev B 87, 155114 (2013);
3, Xie Chen, Zheng-Cheng Gu, Zheng-Xin Liu, Xiao-Gang Wen, Symmetry protected topological orders in interacting bosonic systems, Science 338, 1604 (2012);
2, Zheng-Xin Liu, Zhen-Biao Yang, Yong-Jian Han, Wei Yi, Xiao-Gang Wen, Symmetry Protected Topological Phases in Spin Ladders with Two-body Interactions, Phys. Rev. B 86, 195122 (2012);
1, Zheng-Xin Liu, Yi Zhou, Hong-Hao Tu, Xiao-Gang Wen, Tai-Kai Ng, Gutzwiller projected wave functions in the fermionic theory of S = 1 spin chains, Phys. Rev. B 85,195144 (2012);