Neel and spin-peierls ground states of two-dimensional SU(N) quantum antiferromagnets -: art. no. 117203

被引：88
|
作者：
Harada, K [1 ]
Kawashima, N
Troyer, M
机构：
[1] Kyoto Univ, Dept Appl Anal & Complex Dynam Syst, Kyoto 6068501, Japan
[2] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan
[3] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.90.117203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The two-dimensional SU(N) quantum antiferromagnet, a generalization of the quantum Heisenberg model, is investigated by quantum Monte Carlo simulations. The ground state for Nless than or equal to4 is found to be of the Neel type with broken SU(N) symmetry, whereas it is of the Spin-Peierls type for Ngreater than or equal to5 with broken lattice translational invariance. Our computation of the magnetization and the dimerization order parameter shows the absence of the intermediate spin-liquid phase.
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页数：4
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