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题名: Supersolidity and phase diagram of soft-core bosons on a triangular lattice
作者: Gan, Jing-Yu ;  Wen, Yu-Chuan ;  Yu, Yue
刊名: PHYSICAL REVIEW B
出版日期: 2007
卷号: 75, 期号:9, 页码:-
关键词: QUANTUM MONTE-CARLO ;  BOSE-EINSTEIN CONDENSATION ;  SUPERFLUID ;  HELIUM ;  MODEL ;  CRYSTALS ;  ATOMS
学科分类: Physics
通讯作者: Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
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
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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000245328500075
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5778
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Gan, Jing-Yu,Wen, Yu-Chuan,Yu, Yue. Supersolidity and phase diagram of soft-core bosons on a triangular lattice[J]. PHYSICAL REVIEW B,2007,75(9):-.
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