THE HEISENBERG-ANTIFERROMAGNET ON A TRIANGULAR LATTICE - A RENORMALIZATION-GROUP STUDY

被引：16

作者：

APEL, W ^{[1
]}

WINTEL, M ^{[1
]}

EVERTS, HU ^{[1
]}

机构：

[1] UNIV HANOVER, INST THEORET PHYS, W-3000 HANNOVER 1, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 86卷 / 01期

关键词：

D O I：

10.1007/BF01323558

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the Heisenberg antiferromagnet in two dimensions on a triangular lattice. Using the coherent state representation for spin S>> 1 and performing the spatial continuum limit we arrive at the action L of a nonlinear sigma-model. The constituent classical fields of L are a set of three three-dimensional orthogonal unit vectors. The origin of the symmetries of L is uncovered. We investigate this model by a one-loop renormalisation group analysis. In the high temperature limit as well as at zero temperature, the model scales to a fixed point of higher symmetry.

引用

页码：139 / 143

页数：5

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