ABSENCE OF LONG-RANGE ORDER IN A 3-DIMENSIONAL GEOMETRICALLY FRUSTRATED ANTIFERROMAGNET

被引：168

作者：

REIMERS, JN ^{[1
]}

机构：

[1] MCMASTER UNIV,INST MAT RES,HAMILTON L8S 4M1,ONTARIO,CANADA

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.45.7287

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Classical Heisenberg spins on a lattice of corner-sharing tetrahedra with nearest-neighbor antiferromagnetic interactions are investigated with Monte Carlo (MC) techniques. The system is highly frustrated with an infinitely degenerate ground state. Mean-field theory predicts no long-range order (LRO) at any temperature. The MC calculations are consistent with this result, thus providing evidence that thermal fluctuations beyond the mean-field approximation do not stabilize LRO. The possibility of incommensurate and spin nematic order is considered. The temperature dependence of some spin-glass order parameters, such as the Edwards-Anderson order parameter and the single-spin autocorrelation function, are also investigated. The results show that no spin freezing occurs at nonzero temperatures.

引用

页码：7287 / 7294

页数：8

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