兰州大学机构库 >物理科学与技术学院
Topological quantum phase transition in Kane-Mele-Kondo lattice model
Zhong, Y; Wang, YF; Lu, HT(陆汉涛); Luo, HG(罗洪刚); Zhong, Y (reprint author), Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China.
2013-12-10
Source PublicationPhysical Review B: condensed matter and materials physics   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN1098-0121
Volume88Issue:23Pages:-
AbstractWe systematically explore the ground-state phase diagram of the Kane-Mele-Kondo lattice model on the honeycomb lattice; particularly, we focus on its magnetic properties, which are ubiquitous and important in many realistic heavy-fermion materials but have not been clearly studied in the previous publication [X. Y. Feng, J. Dai, C. H. Chung, and Q. Si, Phys. Rev. Lett. 111, 016402 (2013)]. Besides the Kondo insulator found in that paper, two kinds of antiferromagnetic spin-density-wave phases are discovered. One is the normal antiferromagnetic spin-density-wave state and the other is a nontrivial topological antiferromagnetic spin-density-wave state, which shows the unexpected Z(2) topological order with a quantized spin Hall conductance and a helical edge state similar to the hotly studied topological insulators. The quantum spin Hall insulator in the work of Feng et al. is found to be absent since it is always unstable to antiferromagnetic spin-density-wave states at least at the mean-field level in our model. Interestingly, the transition between the two spin-density-wave phases is an exotic topological quantum phase transition, whose critical behavior is described by an emergent three-dimensional quantum electrodynamics, in which conduction electrons contribute to the low-energy Dirac fermions while the spin-wave fluctuation of local spins gives rise to an effective dynamic U(1) gauge field. Such nontrivial transition shows radical critical thermodynamic, transport, and single-particle behaviors, which provide a fingerprint for this transition. Additionally, the transition of antiferromagnetic spin-density-wave states to the Kondo insulator is found to be first order. The introduction of two novel magnetic phases and their topological quantum phase transition show rich and intrinsic physics involved in the Kane-Mele-Kondo lattice model.
Subject AreaPhysics
PublisherAMER PHYSICAL SOC
DOI10.1103/PhysRevB.88.235111
Publication PlaceCOLLEGE PK
Indexed BySCIE
Language英语
First Inst
Funding Project国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 新世纪优秀人才支持计划 ; 长江学者和创新团队发展计划 ; 中央高校基本科研业务费专项资金
Project NumberNSFC ; PCSIRT [IRT1251] ; Program for NCET ; Fundamental Research Funds for the Central Universities ; national program for basic research of China
WOS IDWOS:000328678200003
Funding OrganizationNSFC ; MOST ; MOE ; LZU
SubtypeArticle
Department[Zhong, Yin;
Wang, Yu-Feng;
Lu, Han-Tao;
Luo, Hong-Gang] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China;
[Zhong, Yin;
Wang, Yu-Feng;
Lu, Han-Tao;
Luo, Hong-Gang] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, MoE, Lanzhou 730000, Peoples R China;
[Luo, Hong-Gang] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/106004
Collection物理科学与技术学院
Corresponding AuthorZhong, Y (reprint author), Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China.
Recommended Citation
GB/T 7714
Zhong, Y,Wang, YF,Lu, HT,et al. Topological quantum phase transition in Kane-Mele-Kondo lattice model[J]. Physical Review B: condensed matter and materials physics,2013,88(23):-.
APA Zhong, Y,Wang, YF,Lu, HT,Luo, HG,&Zhong, Y .(2013).Topological quantum phase transition in Kane-Mele-Kondo lattice model.Physical Review B: condensed matter and materials physics,88(23),-.
MLA Zhong, Y,et al."Topological quantum phase transition in Kane-Mele-Kondo lattice model".Physical Review B: condensed matter and materials physics 88.23(2013):-.
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