Triply degenerate nodal points and topological phase transitions in NaCu3Te2

doi:10.1103/PhysRevB.96.241204

	Triply degenerate nodal points and topological phase transitions in NaCu3Te2
	Xia, Yunyouyou; Li, Gang
	2017-12-29
发表期刊	PHYSICAL REVIEW B
ISSN	2469-9950
卷号	96 期号:24
发表状态	已发表
DOI	10.1103/PhysRevB.96.241204
摘要	Quasiparticle excitations of free electrons in condensed-matter physics, characterized by the dimensionality of the band crossing, can find their elementary-particle analogs in high-energy physics, such as Majorana, Weyl, and Dirac fermions, while crystalline symmetry allows more quasiparticle excitations and exotic fermions to emerge. Using symmetry analysis and ab initio calculations, we propose that the three-dimensional honeycomb crystal NaCu3Te2 hosts triply degenerate nodal points (TDNPs) residing at the Fermi level. Furthermore, in this system we find a tunable phase transition between a trivial insulator, a TDNP phase, and a weak topological insulator (TI), triggered by a symmetry-allowed perturbation and the spin-orbital coupling (SOC). Such a topological nontrivial ternary compound not only serves as a perfect candidate for studying three-component fermions, but also provides an excellent playground for understanding the topological phase transitions between TDNPs, TIs, and trivial insulators, which distinguishes this system from other TDNP candidates.
收录类别	SCI ; EI
语种	英语
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000419008900002
出版者	AMER PHYSICAL SOC
EI入藏号	20191906873826
EI主题词	Calculations ; Copper compounds ; High energy physics ; Sodium compounds ; Tellurium compounds ; Topological insulators ; Topology
EI分类号	Mathematics:921 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; High Energy Physics:932.1 ; Crystal Lattice:933.1.1
WOS关键词	HGTE QUANTUM-WELLS ; SINGLE DIRAC CONE ; MAJORANA FERMIONS ; WANNIER FUNCTIONS ; SURFACE ; INSULATOR ; SEMIMETAL ; SUPERCONDUCTOR ; SCHEMES ; BI2TE3
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/16283
专题	物质科学与技术学院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_博士生
通讯作者	Li, Gang
作者单位	ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China
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	Xia, Yunyouyou,Li, Gang. Triply degenerate nodal points and topological phase transitions in NaCu3Te2[J]. PHYSICAL REVIEW B,2017,96(24).
APA	Xia, Yunyouyou,&Li, Gang.(2017).Triply degenerate nodal points and topological phase transitions in NaCu3Te2.PHYSICAL REVIEW B,96(24).
MLA	Xia, Yunyouyou,et al."Triply degenerate nodal points and topological phase transitions in NaCu3Te2".PHYSICAL REVIEW B 96.24(2017).