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题名: Tunable anisotropic superfluidity in an optical kagome superlattice
作者: Zhang, XF;  Wang, T;  Eggert, S;  Pelster, A
刊名: PHYSICAL REVIEW B
出版日期: 2015
卷号: 92, 期号:1, 页码:14512
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevB.92.014512
通讯作者: Zhang, XF (reprint author), Tech Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany.
文章类型: Article
英文摘要: We study the phase diagram of the Bose-Hubbard model on the kagome lattice with a broken sublattice symmetry. Such a superlattice structure can naturally be created and tuned by changing the potential offset of one sublattice in the optical generation of the frustrated lattice. The superstructure gives rise to a rich quantum phase diagram, which is analyzed by combining quantum Monte Carlo simulations with the generalized effective potential Landau theory. Mott phases with noninteger filling and a characteristic order along stripes are found, which show a transition to a superfluid phase with an anisotropic superfluid density. Surprisingly, the direction of the superfluid anisotropy can be tuned by changing the particle number, the hopping strength, or the interaction. Finally, we discuss characteristic signatures of anisotropic phases in time-of-flight absorption measurements.
类目[WOS]: Physics, Condensed Matter
关键词[WOS]: ANTIFERROMAGNET ;  TRANSITION ;  INSULATOR ;  LATTICES ;  PHYSICS ;  GASES ;  ATOMS ;  STATE
收录类别: SCI
项目资助者: Allianz fur Hochleistungsrechnen Rheinland-Pfalz ;  German Research Foundation (DFG) via the Collaborative Research Center [SFB/TR49] ;  Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20916
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Recommended Citation:
Zhang, XF,Wang, T,Eggert, S,et al. Tunable anisotropic superfluidity in an optical kagome superlattice[J]. PHYSICAL REVIEW B,2015,92(1):14512.
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