论文摘要
An intrinsic magnetic topological insulator（TI） is a stoichiometric magnetic compound possessing both inherent magnetic order and topological electronic states. Such a material can provide a shortcut to various novel topological quantum effects but remained elusive experimentally for a long time. Here we report the experimental realization of thin films of an intrinsic magnetic TI, MnBi2Te4, by alternate growth of a Bi2Te3 quintuple layer and a MnTe bilayer with molecular beam epitaxy. The material shows the archetypical Dirac surface states in angle-resolved photoemission spectroscopy and is demonstrated to be an antiferromagnetic topological insulator with ferromagnetic surfaces by magnetic and transport measurements as well as first-principles calculations. The unique magnetic and topological electronic structures and their interplays enable the material to embody rich quantum phases such as quantum anomalous Hall insulators and axion insulators at higher temperature and in a well-controlled way.
论文目录
文章来源
类型: 期刊论文
作者: 龚演,郭景文,李佳恒,朱科静,廖孟涵,刘效治,张庆华,谷林,唐林,冯硝,张定,李渭,宋灿立,王立莉,于浦,陈曦,王亚愚,姚宏,段文晖,徐勇,张首晟,马旭村,薛其坤,何珂
来源: Chinese Physics Letters 2019年07期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 电力工业
单位: State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing Academy of Quantum Information Sciences,Collaborative Innovation Center of Quantum Matter,Institute for Advanced Study, Tsinghua University,RIKEN Center for Emergent Matter Science (CEMS),Stanford Center for Topological Quantum Physics, Department of Physics, Stanford University
基金: Supported by the Ministry of Science and Technology of China,the National Science Foundation of China,the Beijing Advanced Innovation Center for Future Chip(ICFC)
分类号: TM21
页码: 70-80
总页数: 11
文件大小: 7534K
下载量: 78