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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
2007
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号75期号:9页码:-
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.
部门归属Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China
关键词Quantum Monte-carlo Bose-einstein Condensation Superfluid Helium Model Crystals Atoms
学科领域Physics
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收录类别SCI
WOS记录号WOS:000245328500075
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5778
专题理论物理所1978-2010年知识产出
通讯作者Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
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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):-.
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