物理学进展2026，Vol.46Issue(1)：13-21,9.DOI:10.13725/j.cnki.pip.2026.01.002
外延Bi(110)/VTe2双层异质结构的原子尺度表征
Atomic-scale characterization of epitaxial Bi(110)/VTe2 bilayer heterostructure
摘要
Abstract
Interplay between topology and magnetism can give rise to exotic properties in topological materials.Two-dimensional bismuth has been extensively studied owing to its topo-logical states with a strong spin-orbit coupling,and 1T-VTe2 monolayer theoretically predicted to host an intrinsic magnetism as experimentally suggested.In this work,we successfully con-structed a vertical heterostructure composed of the two-dimensional Bi(110)monolayer and 1T-VTe2 monolayer by using molecular beam epitaxy(MBE).Scanning tunneling microscopy(STM)measurements revealed that the growth of Bi preferably occurs along the step edges of the VTe2 monolayer,forming a Bi(110)monolayer on top of the VTe2 monolayer next to a peripheral Bi bilayer.The Bi(100)/VTe2 heterostructure exhibits a specific lattice registry with a well-defined moiré periodicity.Scanning tunneling spectroscopy(STS)measurements further unveiled an universal suppression in the local density-of-states at the boundary of the Bi(110)/VTe2 bilayer.By examining the atomic structures of Bi(110)boundaries,we found this effect does not originate from the previously proposed atomic reconstruction at the step edge of Bi(110),but is likely related to the magnetic properties of the VTe2 monolayer.关键词
Bi(100)/VTe2异质结/莫尔图案/边界态/分子束外延/扫描隧道显微学Key words
Bi/VTe2 heterostructure/moiré pattern/edge state/molecular beam epitaxy/scanning tunneling microscopy分类
数理科学引用本文复制引用
汪琪玮,李绍春..外延Bi(110)/VTe2双层异质结构的原子尺度表征[J].物理学进展,2026,46(1):13-21,9.基金项目
This work was financially supported by the Na-tional Key Research and Development Program of China(Grant No.2021YFA1400403),the National Natural Science Foundation of China(Grant Nos.12374183,92165205),the Natural Science Foundation of Jiangsu Province(Grant No.BK20233001),the In-novation Program for Quantum Science and Technol-ogy(Grant No.2021ZD0302800)and the Fundamental Research Funds for the Central Universities(Grant No.020414380207). （Grant No.2021YFA1400403）
