文献类型：期刊文献

英文题名：Prediction of coexistence of anomalous valley Hall and quantum anomalous Hall effects in breathing kagome-honeycomb lattices

作者：Liu, Lei[1,2,3];Zhao, Bao[1,2,3,4];Zhang, Jiayong[5];Bao, Hairui[1,2,3];Huan, Hao[1,2,3];Xue, Yang[1,2,3,6];Li, Yue[1,2,3];Yang, Zhongqin[1,2,3,7]

机构：[1]Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China;[2]Fudan Univ, Key Lab Computat Phys Sci MOE, Shanghai 200433, Peoples R China;[3]Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China;[4]Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng 252059, Shandong, Peoples R China;[5]Suzhou Univ Sci & Technol, Sch Phys Sci & Technol, Jiangsu Key Lab Micro & Nano Heat Fluid Flow Tech, Suzhou 215009, Peoples R China;[6]East China Univ Sci & Technol, Sch Sci, Shanghai 200237, Peoples R China;[7]Shanghai Qi Zhi Inst, Shanghai 200030, Peoples R China

年份：2021

卷号：104

期号：24

外文期刊名：PHYSICAL REVIEW B

收录：;EI(收录号：20220111417003);WOS:【SCI-EXPANDED(收录号:WOS:000731421600005)】；

基金：This paper was supported by the National Natural Sci-ence Foundation of China under Grants No. 11574051, No. 11874117, No. 11604134, No. 11904101, and No. 12174059and the Natural Science Foundation of Shanghai under Grant No. 21ZR1408200. The calculations were performed at the High Performance Computational Center (HPCC) of the De-partment of Physics at Fudan University.

语种：英文

外文关键词：Degrees of freedom (mechanics) - Crystalline materials - Quantum Hall effect - Electronic states - Honeycomb structures - Calculations - Landforms - Quantum theory

摘要：To explore the behaviors of valley degrees of freedom, we built a breathing kagome-honeycomb (BKH) lattice composed of a breathing kagome sublattice (BKL) and a breathing honeycomb sublattice (BHL). Many metal-organic frameworks (MOFs) without space-inversion symmetry (SIS) can be modeled as BKH lattices. The electronic states and the evolution of Dirac cones of the constructed BKH lattice under magnetic exchange and spin-orbit coupling interactions were investigated based on a tight-binding model and first-principles calculations. Coexistence states of anomalous valley Hall (AVH) and quantum anomalous Hall (QAH) effects, namely, the multiple Hall effects, were achieved in the BKH lattice with pz orbitals located at the BKL and px, py (and also dxy,dx2-y2) orbitals located at the BHL. The properties of the coexisting state, including the valley polarized status (at K or K') and the chirality of the QAH effect, were determined by the overlapping styles of the bands from the two sublattices. An MOF of C6N3H3Au with a BKH lattice is proposed. Given the coexistence of the AVH and QAH effects in this built MOF, the metallic edge state protected by the topology of the MOF is 100% valley polarized, different from the ordinary QAH effect. Our results provide insights into the electronic states of the MOFs without SIS and a material platform with potential applications in not only valleytronics but also electronics and spintronics.