南方科技大学知识苑(SUSTech KC): Type-II quadratic and cubic Weyl fermions

题名	Type-II quadratic and cubic Weyl fermions
作者	Jin, Y. J.1,2 ; Xu, Y.1 ; Chen, Z. J.1 ; Xu, H.1,3,4
通讯作者	Xu, H.
发表日期	2022-01-25
DOI	10.1103/PhysRevB.105.035141
发表期刊	PHYSICAL REVIEW B 影响因子和分区
ISSN	2469-9950
EISSN	2469-9969
卷号	105 期号:3
摘要	Type-II Weyl fermions characterized by tilted energy dispersions have attracted significant interest because such quasiparticles exhibit unique properties due to their open Fermi surfaces. Herein, we propose type-II quadratic (cubic) Weyl fermions by combining tilted energy dispersions with higher Chern numbers C = +/- 2 (+/- 3), making the classification of chiral fermions more complete. Unlike type-II Weyl fermions with tilted energy dispersions along any direction, type-II quadratic (cubic) Weyl fermions can only be tilted along a rotational axis. Our analytical solutions of Landau levels and magneto-optical spectra show that type-II quadratic (cubic) Weyl fermions have unique absorption properties, such as different locations and widths of the absorption peaks compared with known chiral fermions, which can be used as a reference to detect these Weyl fermions in experiments. Using first-principles calculations, we identify the type-II quadratic Weyl fermions in cubic CaGe2, in which the electron and hole pockets touch at the nodes with C = +2 and two visible Fermi arcs come out from the type-II quadratic Weyl points.
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
学校署名	第一 ; 通讯
资助项目	Science, Technology and Innovation Commission of Shenzhen Municipality["RCYX20200714114523069","ZDSYS20190902092905285"] ; National Natural Science Foundation of China[11974160] ; Guangdong Provincial Key Laboratory of Computational Science and Material Design[2019B030301001]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000753909200002
出版者	AMER PHYSICAL SOC
EI入藏号	20220511577320
EI主题词	Dispersions
EI分类号	Mathematics:921 ; Materials Science:951
ESI学科分类	PHYSICS
来源库	Web of Science
引用统计	被引频次[WOS]：8
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/291056
专题	理学院_物理系
作者单位	1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 2.Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China 3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Computat Sci & Mat Design, Shenzhen 518055, Peoples R China 4.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China
第一作者单位	物理系
通讯作者单位	物理系; 南方科技大学
第一作者的第一单位	物理系
推荐引用方式 GB/T 7714	Jin, Y. J.,Xu, Y.,Chen, Z. J.,et al. Type-II quadratic and cubic Weyl fermions[J]. PHYSICAL REVIEW B,2022,105(3).
APA	Jin, Y. J.,Xu, Y.,Chen, Z. J.,&Xu, H..(2022).Type-II quadratic and cubic Weyl fermions.PHYSICAL REVIEW B,105(3).
MLA	Jin, Y. J.,et al."Type-II quadratic and cubic Weyl fermions".PHYSICAL REVIEW B 105.3(2022).