刘正鑫-中国人民大学物理学系

理论物理（凝聚态）

刘正鑫教授

办公地点：北园物理楼405B

电子邮箱：liuzxphys@ruc.edu.cn

电　　话：62510581

传　　真：

研究组主页：

教育经历

.博士(2007-2010)：香港科技大学-物理系

.硕士(2004-2007) ：南开大学-陈省身数学研究所-理论物理研究室

.学士(1998-2004) ：南开大学-物理科学学院

工作经历

.中国人民大学物理系-副教授、教授 (2015年9月-至今)
.加拿大理论物理前沿研究所-访问学者 (2013年11月 - 2014年2月，2015年3月- 4月)
.清华大学高等研究院-副研究员 (2012年10月 - 2015年9月)
.麻省理工学院物理系-访问学者 (2011年3月-5月，2012年2月-5月)
.清华大学高等研究院-博士后 [获得“杨振宁青年学者奖”](2010年10月 - 2012年10月)

研究兴趣

.低维阻挫量子磁性系统，包括量子自旋液体以及磁有序相的相变、低能有效理论、动力学和输运行为等；
.磁性拓扑半金属、周期性磁结构中的拓扑物态及其物理性质等；
.拓扑序、对称保护拓扑序及拓扑量子计算，包括分类研究、模型实现、数值模拟及其潜在应用等；
.节点（线）超导体中的激发谱、非常规超导的机理等；
.量子多体算法，包括变分蒙特卡洛方法、张量重整化群方法等。

科研项目

5，国家自然科学基金重点项目，强自旋-轨道耦合自旋液体材料的量子禁闭和解禁闭（1***4020），2022.01-2026.12，参与者(骨干)；

4，国家自然科学基金面上项目，六角晶格上自旋液体相的理论研究（11974421），2020.01-2023.12，负责人；

3，国家自然科学基金面上项目，自旋模型中的新奇量子态（11574392），2016.01-2019.12，负责人；

2，国家重点研发计划，量子自旋阻挫体系和自旋液体中的新奇量子效应及调控研究，2016.07-2021.06，参与者；

1，国家自然科学基金青年项目，大自旋反铁磁系统的量子磁性（11204149），2013.01-2015.12，负责人。

近期代表性研究成果

近五年主要研究成果

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);

五年以上代表性工作

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);