標題: Commensurate lock-in and incommensurate supersolid phases of hard-core bosons on anisotropic triangular lattices
作者: Isakov, Sergei V.
Chien, Hong-Chi
Wu, Jian-Jheng
Chen, Yung-Chung
Chung, Chung-Hou
Sengupta, Krishnendu
Kim, Yong Baek
電子物理學系
Department of Electrophysics
公開日期: 1-Aug-2009
摘要: We investigate the interplay between commensurate lock-in and incommensurate supersolid phases of the hard-core bosons at half-filling with anisotropic nearest-neighbor hopping and repulsive interactions on triangular lattice. We use numerical quantum and variational Monte Carlo as well as analytical Schwinger boson mean-field analysis to establish the ground states and phase diagram. It is shown that, for finite-size systems, there exist a series of jumps between different supersolid phases as the anisotropy parameter is changed. The density ordering wave vectors are locked to commensurate values and jump between adjacent supersolids. In the thermodynamic limit, however, the magnitude of these jumps vanishes leading to a continuous set of novel incommensurate supersolid phases. Copyright (C) EPLA, 2009
URI: http://dx.doi.org/10.1209/0295-5075/87/36002
http://hdl.handle.net/11536/6837
ISSN: 0295-5075
DOI: 10.1209/0295-5075/87/36002
期刊: EPL
Volume: 87
Issue: 3
結束頁: 
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