Supersolidity and phase diagram of soft-core bosons on a triangular lattice

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	Supersolidity and phase diagram of soft-core bosons on a triangular lattice
	Gan, Jing-Yu; Wen, Yu-Chuan; Yu, Yue; Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
刊名	PHYSICAL REVIEW B
	2007
卷号	75 期号:9 页码:-
关键词	Quantum Monte-carlo Bose-einstein Condensation Superfluid Helium Model Crystals Atoms
ISSN号	1098-0121
英文摘要	We study the soft-core extended Bose-Hubbard model in a two-dimensional triangular lattice by using the quantum Monte Carlo methods. The ground-state phase diagram of the system exhibits a very fruitful structure and is much intriguing. Aside from the Mott insulating state, four kinds of solid states with respect to the commensurate filling factors rho=1/3,2/3 and rho=1 are identified. In incommensurate fillings, superfluid, supersolid, as well as phase-separation states are detected. As in the case of the hard-core bosons, a supersolid phase exists in 1/3 < 2/3 while it is unstable toward the phase separation in rho < 1/3. However, this instability is refrained in 2/3 < 1 due to the softening of the bosons, and then a supersolid phase survives.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000245328500075
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5778]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Gan, Jing-Yu,Wen, Yu-Chuan,Yu, Yue,et al. Supersolidity and phase diagram of soft-core bosons on a triangular lattice[J]. PHYSICAL REVIEW B,2007,75(9):-.
APA	Gan, Jing-Yu,Wen, Yu-Chuan,Yu, Yue,&Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.(2007).Supersolidity and phase diagram of soft-core bosons on a triangular lattice.PHYSICAL REVIEW B,75(9),-.
MLA	Gan, Jing-Yu,et al."Supersolidity and phase diagram of soft-core bosons on a triangular lattice".PHYSICAL REVIEW B 75.9(2007):-.