Excitonic condensation for the surface states of topological insulator bilayers

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Excitonic condensation for the surface states of topological insulator bilayers
	Wang, ZG ; Hao, NN ; Fu, ZG ; Zhang, P
刊名	NEW JOURNAL OF PHYSICS
	2012
卷号	14
关键词	HGTE QUANTUM-WELLS SINGLE DIRAC CONE BI2TE3 PHASE CU2O GAS
ISSN号	1367-2630
通讯作者	Zhang, P: Inst Appl Phys & Computat Math, LCP, POB 8009, Beijing 100088, Peoples R China.
中文摘要	We propose a generic topological insulator bilayer (TIB) system to study the excitonic condensation with self-consistent mean-field (SCMF) theory. We show that the TIB system presents the crossover behavior from the Bardeen-Cooper-Schrieffer (BCS) limit to the Bose-Einstein condensation (BEC) limit. Moreover, in comparison with traditional semiconductor systems, we find that for the present system the superfluid property in the BEC phase is more sensitive to electron-hole density imbalance and the BCS phase is more robust. Applying this TIB model to the Bi2Se3-family material, we find that the BEC phase is most likely to be observed in experiment. We also calculate the critical temperature for the Bi2Se3-family TIB system, which is similar to 100 K. More interestingly, one can expect this relative high-temperature excitonic condensation, since our calculated SCMF critical temperature is approximately equal to the Kosterlitz-Thouless transition temperature.
收录类别	SCI
资助信息	Natural Science Foundation of China [90921003, 10904005]; National Basic Research Program of China (973 Program) [2009CB929103.]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37753]
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	Wang, ZG,Hao, NN,Fu, ZG,et al. Excitonic condensation for the surface states of topological insulator bilayers[J]. NEW JOURNAL OF PHYSICS,2012,14.
APA	Wang, ZG,Hao, NN,Fu, ZG,&Zhang, P.(2012).Excitonic condensation for the surface states of topological insulator bilayers.NEW JOURNAL OF PHYSICS,14.
MLA	Wang, ZG,et al."Excitonic condensation for the surface states of topological insulator bilayers".NEW JOURNAL OF PHYSICS 14(2012).