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Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2 | |
Su, Hao1,2; Gong, Benchao3,4; Shi, Wujun1; Yang, Haifeng1; Wang, Hongyuan1,2; Xia, Wei1,2; Yu, Zhenhai1; Guo, Peng-Jie3,4; Wang, Jinhua5,6; Ding, Linchao5,6; Xu, Liangcai5,6; Li, Xiaokang5,6; Wang, Xia7; Zou, Zhiqiang7; Yu, Na7; Zhu, Zengwei5,6; Chen, Yulin1,8; Liu, Zhongkai1; Liu, Kai3,4; Li, Gang1; Guo, Yanfeng1,2
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2020 | |
发表期刊 | APL MATERIALS |
ISSN | 2166-532X |
卷号 | 8期号:1 |
发表状态 | 已发表 |
DOI | 10.1063/1.5129467 |
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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