COEXISTENCE OF DIAGONAL AND OFF-DIAGONAL LONG-RANGE ORDER - A MONTE-CARLO STUDY

被引：73

作者：

VANOTTERLO, A

WAGENBLAST, KH

机构：

[1] Institut für Theoretische Festkörperphysik, Universität Karlsruhe

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.72.3598

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The zero temperature properties of interacting two dimensional lattice bosons are investigated. We present Monte Carlo data for soft-core bosons that demonstrate the existence of a phase in which crystalline long-range order and off-diagonal long-range order (superfluidity) coexist. We comment on the difference between hard- and soft-core bosons and compare our data to mean-field results that predict a larger coexistence region. Furthermore, we determine the critical exponents for the various phase transitions.

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页码：3598 / 3601

页数：4

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