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题名: Static impurities in a supersolid of interacting hard-core bosons on a triangular lattice
作者: Zhang, Xue-Feng ;  Wen, Yu-Chuan ;  Eggert, Sebastian
刊名: PHYSICAL REVIEW B
出版日期: 2010
卷号: 82, 期号:22, 页码:-
关键词: CONSEQUENCES ;  HELIUM ;  CHAINS
学科分类: Physics
通讯作者: Zhang, XF , Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany
部门归属: [Zhang, XF; Eggert, S] Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany; [Zhang, XF; Eggert, S] Univ Kaiserslautern, Res Ctr OPTIMAS, D-67663 Kaiserslautern, Germany; [Zhang, XF] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Wen, YC] Capital Normal Univ, Dept Phys, Ctr Theoret Phys, Beijing 10048, Peoples R China
英文摘要: We study the effect of impurities in a supersolid phase in comparison to the behavior in the solid and superfluid phases. A supersolid phase has been established for interacting hard-core bosons on a triangular lattice which may be realizable by ultracold atomic gases. Static vacancies are considered in this model which always lower the magnitude of the order parameter in the solid or superfluid phases. In the supersolid phase, however, the impurities directly affect both order parameters simultaneously and thereby reveal an interesting interplay between them. In particular, the solid order may be enhanced at the cost of a strong reduction in the superfluidity, which shows that the two order parameters cannot be in a simple superposition. We also observe an unusual impurity pinning effect in the solid ordered phase, which results in two distinct states separated by a first-order transition.
资助者: National Natural Science Foundation of China[10904096, 10604024]; Natural Science Foundation of Beijing[1092009]; DAAD; DFG via the Research Center[Transregio 49]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000286758100001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/4995
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zhang, Xue-Feng,Wen, Yu-Chuan,Eggert, Sebastian. Static impurities in a supersolid of interacting hard-core bosons on a triangular lattice[J]. PHYSICAL REVIEW B,2010,82(22):-.
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