Striped phase in a quantum XY model with ring exchange -: art. no. 247201

被引：99

作者：

Sandvik, AW

Daul, S

Singh, RRP

Scalapino, DJ

机构：

[1] Abo Akad Univ, Dept Phys, FIN-20500 Turku, Finland

[2] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[3] Univ Calif Santa Barbara, Inst Theoret Phys, Santa Barbara, CA 93106 USA

[4] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 24期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.89.247201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present quantum Monte Carlo results for a square-lattice S=1/2 XY model with a standard nearest-neighbor coupling J and a four-spin ring exchange term K. Increasing K/J, we find that the ground state spin stiffness vanishes at a critical point at which a spin gap opens and a striped bond-plaquette order emerges. At still higher K/J, this phase becomes unstable and the system develops a staggered magnetization. We discuss the quantum phase transitions between these phases.

引用

收藏

页码：247201 / 247201

页数：4

相关论文

共 40 条

[21] VALENCE-BOND AND SPIN-PEIERLS GROUND-STATES OF LOW-DIMENSIONAL QUANTUM ANTIFERROMAGNETS [J].

READ, N ;

SACHDEV, S .

PHYSICAL REVIEW LETTERS, 1989, 62 (14) :1694-1697

[22] CYCLIC 4-SPIN EXCHANGE ON A TWO-DIMENSIONAL SQUARE LATTICE - POSSIBLE APPLICATIONS IN HIGH-TC SUPERCONDUCTORS [J].

ROGER, M ;

DELRIEU, JM .

PHYSICAL REVIEW B, 1989, 39 (04) :2299-2303

[23] MAGNETISM IN SOLID HE-3 [J].

ROGER, M ;

HETHERINGTON, JH ;

DELRIEU, JM .

REVIEWS OF MODERN PHYSICS, 1983, 55 (01) :1-64

[24] Multiple-spin exchange on a triangular lattice:: A quantitative interpretation of thermodynamic properties of two-dimensional solid 3He [J].

Roger, M ;

Bauerle, C ;

Bunkov, YM ;

Chen, AS ;

Godfrin, H .

PHYSICAL REVIEW LETTERS, 1998, 80 (06) :1308-1311

[25] Ground states of quantum antiferromagnets in two dimensions [J].

Sachdev, S ;

Park, K .

ANNALS OF PHYSICS, 2002, 298 (01) :58-122

[26] Stochastic series expansion method with operator-loop update [J].

Sandvik, AW .

PHYSICAL REVIEW B, 1999, 59 (22) :14157-14160

[27] QUANTUM MONTE-CARLO SIMULATION METHOD FOR SPIN SYSTEMS [J].

SANDVIK, AW ;

KURKIJARVI, J .

PHYSICAL REVIEW B, 1991, 43 (07) :5950-5961

[28] Finite-size scaling of the ground-state parameters of the two-dimensional Heisenberg model [J].

Sandvik, AW .

PHYSICAL REVIEW B, 1997, 56 (18) :11678-11690

[29] Ground-state parameters, finite-size sealing, and low-temperature properties of the two-dimensional S=1/2 XY model [J].

Sandvik, AW ;

Hamer, CJ .

PHYSICAL REVIEW B, 1999, 60 (09) :6588-6593

[30] Multichain mean-field theory of quasi-one-dimensional quantum spin systems [J].

Sandvik, AW .

PHYSICAL REVIEW LETTERS, 1999, 83 (15) :3069-3072

← 1 2 3 4 →