Theoretical paradigm for the quantum spin Hall effect at high temperatures

doi:10.1103/PhysRevB.98.165146

	Theoretical paradigm for the quantum spin Hall effect at high temperatures
	Li, Gang1 ; Hanke, Werner 2; Hankiewicz, Ewelina M.2; Reis, Felix 3,4; Schaefer, Joerg 3,4; Claessen, Ralph 3,4; Wu, Congjun 5; Thomale, Ronny 2
	2018-10-29
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	98 期号:16
发表状态	已发表
DOI	10.1103/PhysRevB.98.165146
摘要	The quantum spin Hall effect (QSHE) has formed the seed for contemporary research on topological quantum states of matter. Since its discovery in HgTe/CdTe quantum wells and InAs/GaSb heterostructures, all such systems have so far been suffering from extremely low operating temperatures, rendering any technological application out of reach. We formulate a theoretical paradigm to accomplish the high temperature QSHE in monolayer-substrate heterostructures. Specifically, we explicate our proposal for hexagonal compounds formed by monolayers of heavy group-V elements (As, Sb, Bi) on a SiC substrate. We show how orbital filtering due to substrate hybridization, a tailored multiorbital density of states at low energies, and large spin-orbit coupling can conspire to yield QSH states with bulk gaps of several hundreds of meV. Combined with the successful realization of Bi/SiC (0001), with a measured bulk gap of similar to 800 meV reported previously [F. Reis et al., Science 357, 287 (2017)], our paradigm elevates the QSHE from an intricate quantum phenomenon at low temperatures to a scalable effect amenable to device design and engineering.
收录类别	SCI ; SCIE
语种	英语
资助项目	Air Force Office for Scientific Research (AFOSR)[FA9550-14-1-0168]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000448596500007
出版者	AMER PHYSICAL SOC
WOS关键词	TOPOLOGICAL INSULATORS ; WANNIER FUNCTIONS ; STATE ; WELLS
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/28298
专题	物质科学与技术学院_PI研究组_李刚组
通讯作者	Li, Gang
作者单位	1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China 2.Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany 3.Univ Wurzburg, Phys Inst, D-97074 Wurzburg, Germany 4.Univ Wurzburg, Rontgen Ctr Complex Mat Syst, D-97074 Wurzburg, Germany 5.Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
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	Li, Gang,Hanke, Werner,Hankiewicz, Ewelina M.,et al. Theoretical paradigm for the quantum spin Hall effect at high temperatures[J]. PHYSICAL REVIEW B,2018,98(16).
APA	Li, Gang.,Hanke, Werner.,Hankiewicz, Ewelina M..,Reis, Felix.,Schaefer, Joerg.,...&Thomale, Ronny.(2018).Theoretical paradigm for the quantum spin Hall effect at high temperatures.PHYSICAL REVIEW B,98(16).
MLA	Li, Gang,et al."Theoretical paradigm for the quantum spin Hall effect at high temperatures".PHYSICAL REVIEW B 98.16(2018).