Long-range order disappearance in 2D antiferromagnetic system with quantum complex spin

被引：0
|
作者：
Mikheyenkov, A.V. [1 ]
Barabanov, A.F. [1 ]
机构：
[1] Institute for High Pressure Physics, 142092 Moscow Region, Troitsk, Russia
来源：
Physica B: Condensed Matter | 1999年 / 262卷 / 03期
关键词：
Approximation theory - Crystal lattices - Electron energy levels - Phase transitions - Quantum theory;
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学科分类号：
摘要：
Heisenberg mode on 2D square lattice with two spin degrees of freedom on each site is considered. In the frames of spherically symmetric approximation it is shown, that the interaction between spin subsystems can lead to disappearing of antiferromagnetic long-range order. Phase transition can take place either in both subspaces or only in one subspace, the other subspace retaining its order. A possible parameter region for the spin-liquid state is depicted.
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页码：267 / 272
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