Electronic structure of the Si-containing topological Dirac semimetal CaAl2Si2

doi:10.1103/PhysRevB.102.045106

	Electronic structure of the Si-containing topological Dirac semimetal CaAl2Si2
	Deng, Tao 1,2,3; Chen, Cheng3,4,5 ; Su, Hao3 ; He, Junyi 6,7; Liang, Aiji3,5 ; Cui, Shengtao3 ; Yang, Haifeng3 ; Wang, Chengwei1,2,3 ; Huang, Kui3 ; Jozwiak, Chris 4; Bostwick, Aaron 4; Rotenberg, Eli 4; Lu, Donghui 4,8; Hashimoto, Makoto 4,8; Yang, Lexian 9,10,11; Liu, Zhi1,3 ; Guo, Yanfeng3 ; Xu, Gang 6,7; Liu, Zhongkai3,5 ; Chen, Yulin3,5,9,12
	2020-07-06
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
EISSN	2469-9969
卷号	102 期号:4
发表状态	已发表
DOI	10.1103/PhysRevB.102.045106
摘要	There has been an upsurge in the discovery of topological quantum materials, where various topological insulators and semimetals have been theoretically predicted and experimentally observed. However, very few of them contain silicon, the most widely used element in the electronics industry. Recently, ternary compound CaAl2Si2 has been predicted to be a topological Dirac semimetal, hosting Lorentz-symmetry-violating quasiparticles with a strongly tilted conical band dispersion. In this work, by using high-resolution angle-resolved photoemission spectroscopy, we investigated the comprehensive electronic structure of CaAl2Si2. A pair of topological Dirac crossings is observed along the k(z) direction, in good agreement with the ab initio calculations, confirming the topological Dirac semimetal nature of the compound. Our study expands the topological material family on Si-containing compounds, which have great application potential in realizing low-cost, nontoxic electronic devices with topological quantum states.
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收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	National Key R&D program of China[2017YFA0305400][2018YFA0307000][2017YFA0304600] ; National Natural Science Foundation of China[11774190][1187402][11674229] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA18010000] ; US DOE Office of Science User Facility[DE-AC02-05CH11231] ; US Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-AC02-76SF00515] ; SiP.ME2 project from National Natural Science Foundation of China[11227902]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000545541000007
出版者	AMER PHYSICAL SOC
WOS关键词	DISCOVERY ; TRANSITION ; INSULATOR ; STATES ; 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/122418
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_柳仲楷组大科学中心_PI研究组_刘志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_特聘教授组_陈宇林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_拓扑物理实验室量子器件中心
通讯作者	Liu, Zhi; Liu, Zhongkai
作者单位	1.Chinese Acad Sci, CAS Ctr Excellence Superconducting Elect CENSE, Shanghai Inst Microsyst & Informat Technol SIMIT, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 4.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA 5.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China 6.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China 7.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China 8.SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA 9.Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China 10.Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Dept Phys, Beijing 100084, Peoples R China 11.Tsinghua Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China 12.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; 上海科技大学
推荐引用方式 GB/T 7714	Deng, Tao,Chen, Cheng,Su, Hao,et al. Electronic structure of the Si-containing topological Dirac semimetal CaAl2Si2[J]. PHYSICAL REVIEW B,2020,102(4).
APA	Deng, Tao.,Chen, Cheng.,Su, Hao.,He, Junyi.,Liang, Aiji.,...&Chen, Yulin.(2020).Electronic structure of the Si-containing topological Dirac semimetal CaAl2Si2.PHYSICAL REVIEW B,102(4).
MLA	Deng, Tao,et al."Electronic structure of the Si-containing topological Dirac semimetal CaAl2Si2".PHYSICAL REVIEW B 102.4(2020).