Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2
2020
发表期刊APL MATERIALS
ISSN2166-532X
卷号8期号:1
发表状态已发表
DOI10.1063/1.5129467
摘要

Magnetic Weyl semimetals (WSMs) bearing long-time seeking are still very rare. We have identified herein that EuCd2Sb2, a semimetal belonging to the type IV magnetic space group, hosts a magnetic exchange induced Weyl state via performing high magnetic field magnetotransport measurements and ab initio calculations. In the A-type antiferromagnetic structure, the external field larger than 3.2 T can align all Eu spins to be fully polarized along the c-axis and consequently drive EuCd2Sb2 into a spin polarized state. Magnetotransport measurements up to similar to 55-60 T showed striking Shubnikov-de Hass oscillations associated with a nontrivial Berry phase. The ab initio calculations unveiled a phase transition of EuCd2Sb2 from a small gap antiferromagnetic topological insulator to a spin polarized WSM in which the Weyl points emerge along the Gamma-Z path. Fermi arcs on (100) and (010) surfaces are also predicted. Meanwhile, the observed large anomalous Hall effect indicates the existence of Weyl points around the Fermi level. The results pave a way toward the realization of various topological states in a single material through the magnetic exchange manipulation.

收录类别SCI ; SCIE ; EI
语种英语
资助项目National Natural Science Foundation of China[11774424] ; National Natural Science Foundation of China[11674229] ; National Natural Science Foundation of China[11874263] ; National Natural Science Foundation of China[11874264]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号WOS:000519597900005
出版者AMER INST PHYSICS
EI入藏号20200408078857
EI主题词Antiferromagnetism ; Antimony compounds ; Cadmium compounds ; Calculations ; Electric currents ; Spin polarization ; Topological insulators
EI分类号Electricity: Basic Concepts and Phenomena:701.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Mathematics:921 ; High Energy Physics:932.1
WOS关键词TOPOLOGICAL DIRAC SEMIMETAL ; TOTAL-ENERGY CALCULATIONS ; MAJORANA ; MAGNETORESISTANCE ; DISCOVERY ; PHASE
原始文献类型Article
引用统计
文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/119154
专题物质科学与技术学院_硕士生
物质科学与技术学院_PI研究组_柳仲楷组
物质科学与技术学院_PI研究组_郭艳峰组
物质科学与技术学院_PI研究组_李刚组
物质科学与技术学院_特聘教授组_陈宇林
物质科学与技术学院_公共科研平台_分析测试平台
硬x射线自由电子激光装置项目
物质科学与技术学院_博士生
物质科学与技术学院_公共科研平台_拓扑物理实验室
大科学中心_公共科研平台_大科学装置建设部
通讯作者Liu, Zhongkai
作者单位
1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
4.Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China
5.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
6.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
7.ShanghaiTech Univ, Analyt Instrumentat Ctr, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
8.Univ Oxford, Dept Phys, Oxford OX1 3PU, England
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院
第一作者的第一单位物质科学与技术学院
推荐引用方式
GB/T 7714
Su, Hao,Gong, Benchao,Shi, Wujun,et al. Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2[J]. APL MATERIALS,2020,8(1).
APA Su, Hao.,Gong, Benchao.,Shi, Wujun.,Yang, Haifeng.,Wang, Hongyuan.,...&Guo, Yanfeng.(2020).Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2.APL MATERIALS,8(1).
MLA Su, Hao,et al."Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2".APL MATERIALS 8.1(2020).
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