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Giant Rashba splitting in PtTe/PtTe heterostructure
Runfa Feng, Yang Zhang, Jiaheng Li +11
Achieving a large spin splitting is highly desirable for spintronic devices, which often requires breaking of the inversion symmetry. However, many atomically thin films are centro…
Evolution of the electronic structure of ultrathin MnBi2Te4 Films
Runzhe Xu, Yunhe Bai, Jingsong Zhou +18
Ultrathin films of intrinsic magnetic topological insulator MnBi2Te4 exhibit fascinating quantum properties such as quantum anomalous Hall effect and axion insulator state. In this…
Light-Tunable Surface State and Hybridization Gap in Magnetic Topological Insulator MnBiTe
Haoyuan Zhong, Changhua Bao, Huan Wang +6
MnBiTe is an intrinsic ferromagnetic (FM) topological insulator with different complex surface terminations. Resolving the electronic structures of different termination…
Detection of magnetic gap in the topological surface states of MnBi2Te4
Haoran Ji, Yanzhao Liu, He Wang +6
Recently, intrinsic antiferromagnetic topological insulator MnBi2Te4 has drawn intense research interest and leads to plenty of significant progress in physics and materials scienc…
Tunable interlayer magnetism and band topology in van der Waals heterostructures of MnBi2Te4-family materials
Zhe Li, Jiaheng Li, Ke He +3
Manipulating the interlayer magnetic coupling in van der Waals magnetic materials and heterostructures is the key to tailoring their magnetic and electronic properties for various…
Electronic states and magnetic response of MnBi2Te4 by scanning tunneling microscopy and spectroscopy
Yonghao Yuan, Xintong Wang, Hao Li +10
Exotic quantum phenomena have been demonstrated in recently discovered intrinsic magnetic topological insulator MnBi2Te4. At its two-dimensional limit, quantum anomalous Hall (QAH)…
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…
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…
Experimental realization of an intrinsic magnetic topological insulator
Yan Gong, Jingwen Guo, Jiaheng Li +21
Intrinsic magnetic topological insulator (TI) is a stoichiometric magnetic compound possessing both inherent magnetic order and topological electronic states. Such a material can p…
Intrinsic magnetic topological insulators in van der Waals layered MnBiTe-family materials
Jiaheng Li, Yang Li, Shiqiao Du +6
The interplay of magnetism and topology is a key research subject in condensed matter physics and material science, which offers great opportunities to explore emerging new physics…
Widely tunable band gap in a multivalley semiconductor SnSe by potassium doping
Kenan Zhang, Ke Deng, Jiaheng Li +6
SnSe, a group IV-VI monochalcogenide with layered crystal structure similar to black phosphorus, has recently attracted extensive interests due to its excellent thermoelectric prop…