Observation of well-defined quasiparticles at a wide energy range in a quasi-two-dimensional system

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	Observation of well-defined quasiparticles at a wide energy range in a quasi-two-dimensional system
	Jia, LL ; Liu, ZH ; Cai, YP ; Qian, T ; Wang, XP ; Miao, H ; Richard, P ; Zhao, YG ; Li, Y ; Wang, DM ; He, JB ; Shi, M ; Chen, GF ; Ding, H ; Wang, SC
刊名	PHYSICAL REVIEW B
	2014
卷号	90 期号:3
ISSN号	1098-0121
通讯作者	Jia, LL (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
中文摘要	We report an observation of a highly anisotropic Dirac-cone structure, and its unconventional electronic behaviors, in high quality SrMnBi2 crystal by angle-resolved photoemission spectroscopy measurement. We observed a well-defined sharp quasiparticle peak in a wide energy range, linearly dispersive, forming a highly anisotropic holelike Dirac cone (upsilon(F1)/upsilon(F2) similar to 5-6). The density of state remains linear, and the scattering rate of the quasiparticle increases linearly as a function of binding energy up to higher binding energy. The results contrast with the expectation for a two-dimensional (2D) or three-dimensional (3D) Fermi-liquid theory and rather suggest the existence of a two-dimensional electron gas system in this 3D material, making SrMnBi2 a potentially useful 2D-electron-gas-encapsulated material.
资助信息	National Science Foundation of China; National Basic Research Program of China (973 Program); Ministry of Education of China; Chinese Academy of Science; SSSTC; University of Wisconsin-Madison; University of Wisconsin-Milwaukee
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59525]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Jia, LL,Liu, ZH,Cai, YP,et al. Observation of well-defined quasiparticles at a wide energy range in a quasi-two-dimensional system[J]. PHYSICAL REVIEW B,2014,90(3).
APA	Jia, LL.,Liu, ZH.,Cai, YP.,Qian, T.,Wang, XP.,...&Wang, SC.(2014).Observation of well-defined quasiparticles at a wide energy range in a quasi-two-dimensional system.PHYSICAL REVIEW B,90(3).
MLA	Jia, LL,et al."Observation of well-defined quasiparticles at a wide energy range in a quasi-two-dimensional system".PHYSICAL REVIEW B 90.3(2014).