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High-Temperature Quantum Anomalous Hall Insulators in Lithium-Decorated Iron-Based Superconductor Materials
Yang Li, Jiaheng Li, Meng Ye +5
Quantum anomalous Hall (QAH) insulator is the key material to study emergent topological quantum effects, but its ultralow working temperature limits experiments. Here, by first-pr…
Quantum Spin Hall Insulators in Tin Films: Beyond Stanene
Jiaheng Li, Yong Xu
Large-gap quantum spin Hall (QSH) insulators were previously predicted in stanene and its derivatives. Beyond stanene that is the thinnest -Sn(111) film, we propose to explore Q…
Berry Curvature Engineering by Gating Two-Dimensional Antiferromagnets
Shiqiao Du, Peizhe Tang, Jiaheng Li +4
Recent advances in tuning electronic, magnetic, and topological properties of two-dimensional (2D) magnets have opened a new frontier in the study of quantum physics and promised e…
Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4
Y. J. Chen, L. X. Xu, J. H. Li +17
Topological quantum materials coupled with magnetism can provide a platform for realizing rich exotic physical phenomena, including quantum anomalous Hall effect, axion electrodyna…
High-Chern-Number and High-Temperature Quantum Hall Effect without Landau Levels
Jun Ge, Yanzhao Liu, Jiaheng Li +5
The quantum Hall effect (QHE) with quantized Hall resistance of h/νe2 starts the research on topological quantum states and lays the foundation of topology in physics. Afterwards,…
Crossover from 2D metal to 3D Dirac semimetal in metallic PtTe2 films with local Rashba effect
Ke Deng, Mingzhe Yan, Chu-Ping Yu +10
PtTe2 and PtSe2 with trigonal structure have attracted extensive research interests since the discovery of type-II Dirac fermions in the bulk crystals. The evolution of the electro…
Evidence of charge density wave with anisotropic gap in monolayer VTe film
Yuan Wang, Junhai Ren, Jiaheng Li +5
We report experimental evidence of charge density wave (CDW) transition in monolayer 1T-VTe film. 44 reconstruction peaks are observed by low energy electron diffractio…
Magnetically Controllable Topological Quantum Phase Transitions in Antiferromagnetic Topological Insulator MnBiTe
Jiaheng Li, Chong Wang, Zetao Zhang +3
The recent discovery of antiferromagnetic (AFM) topological insulator (TI) MnBiTe has triggered great research efforts on exploring novel magnetic topological physics. Base…
Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
Chang Liu, Yongchao Wang, Hao Li +7
The intricate interplay between nontrivial topology and magnetism in two-dimensional (2D) materials has led to the emergence of many novel phenomena and functionalities. An outstan…