Quantum Domain Walls Induce Incommensurate Supersolid Phase on the Anisotropic Triangular Lattice

doi:http://dx.doi.org/10.1103/PhysRevLett.117.193201

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	Quantum Domain Walls Induce Incommensurate Supersolid Phase on the Anisotropic Triangular Lattice
	Zhang, XF ; Hu, SJ ; Pelster, A ; Eggert, S 4,4
刊名	PHYSICAL REVIEW LETTERS
	2016
卷号	117 期号:19 页码:193201
关键词	SPIN-LIQUID FRUSTRATION SUPERFLUID CRYSTALS BOSONS ATOMS
DOI	http://dx.doi.org/10.1103/PhysRevLett.117.193201
英文摘要	We investigate the extended hard-core Bose-Hubbard model on the triangular lattice as a function of spatial anisotropy with respect to both hopping and nearest-neighbor interaction strength. At half-filling the system can be tuned from decoupled one-dimensional chains to a two-dimensional solid phase with alternating density order by adjusting the anisotropic coupling. At intermediate anisotropy, however, frustration effects dominate and an incommensurate supersolid phase emerges, which is characterized by incommensurate density order as well as an anisotropic superfluid density. We demonstrate that this intermediate phase results from the proliferation of topological defects in the form of quantum bosonic domain walls. Accordingly, the structure factor has peaks at wave vectors, which are linearly related to the number of domain walls in a finite system in agreement with extensive quantum Monte Carlo simulations. We discuss possible connections with the supersolid behavior in the high-temperature superconducting striped phase.
学科主题	Physics
语种	英语
资助机构	Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics ; Nachwuchsring of the TU Kaiserslautern ; German Research Foundation (DFG) [SFB/TR49, SFB/TR173, SFB/TR185]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23283]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany 2.[Zhang, Xue-Feng 3.Hu, Shijie 4.Pelster, Axel 5.Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany 6.Univ Kaiserslautern, Res Ctr OPTIMAS, D-67663 Kaiserslautern, Germany 7.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XF,Hu, SJ,Pelster, A,et al. Quantum Domain Walls Induce Incommensurate Supersolid Phase on the Anisotropic Triangular Lattice[J]. PHYSICAL REVIEW LETTERS,2016,117(19):193201.
APA	Zhang, XF,Hu, SJ,Pelster, A,&Eggert, S.(2016).Quantum Domain Walls Induce Incommensurate Supersolid Phase on the Anisotropic Triangular Lattice.PHYSICAL REVIEW LETTERS,117(19),193201.
MLA	Zhang, XF,et al."Quantum Domain Walls Induce Incommensurate Supersolid Phase on the Anisotropic Triangular Lattice".PHYSICAL REVIEW LETTERS 117.19(2016):193201.