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：
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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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