Persistent supersolid phase of hard-core bosons on the triangular lattice

被引：198

作者：

Heidarian, D ^{[1
]}

Damle, K ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Dept Theoret Phys, Bombay 400005, Maharashtra, India

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.95.127206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study hard-core bosons with unfrustrated hopping (t) and nearest neighbor repulsion (U) (spin S = 1/2 XXZ model) on the triangular lattice. At half filling, the system undergoes a zero temperature (T) quantum phase transition from a superfluid phase at small U to a supersolid at U-c approximate to 4: 45 in units of 2t. This supersolid phase breaks the lattice translation symmetry in a characteristic root 3 x root 3 pattern, and is remarkably stable-indeed, a smooth extrapolation of our results indicates that the supersolid phase persists for arbitrarily large U/t.

引用

页数：4

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