Symmetry breaking in the collinear phase of the J1 - J2 Heisenberg model

被引：0

作者：

Singh, R.R.P. ^{[1
]}

Zheng, W. ^{[2
]}

Oitmaa, J. ^{[2
]}

Sushkov, O.P. ^{[2
]}

Hamer, C.J. ^{[2
]}

机构：

[1] Department of Physics, University of California, Davis, CA 95616, United States

[2] School of Physics, University of New South Wales, Sydney, NSW 2052, Australia

来源：

| 2003年 / American Physical Society卷 / 91期

基金：

澳大利亚研究理事会;

关键词：

Crystal lattices - Ground state - Hamiltonians - Mathematical models - Phase transitions - Quantum theory - Thermal effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A study was conducted on the collinear phase of the J1-J2 square-lattice Heisenberg antiferromagnet by series expansion methods. As such, quantitatively accurate excitation spectra which were significantly more accurate than the spin-wave calculations was obtained and may be helpful in determining the exchange parameters for materials with large second neighbor interactions.

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