Thermodynamics of the one-dimensional SU(4) symmetric spin-orbital model

被引：113

作者：

Frischmuth, B ^{[1
]}

Mila, F

Troyer, M

机构：

[1] ETH Honggerberg, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[2] Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France

[3] Univ Tokyo, Inst Solid State Phys, Tokyo 106, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.82.835

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ground-state properties and thermodynamics of the one-dimensional SU(4) symmetric spin system with orbital degeneracy are investigated using the quantum Monte Carlo loop algorithm. The spin spin correlation functions exhibit a 4-site periodicity, and their low-temperature behavior is controlled by two correlation lengths that diverge like the inverse temperature, while the entropy is linear in temperature and its slope is consistent with three gapless modes of velocity pi/2. The physical implications of these results are discussed.

引用

页码：835 / 838

页数：4