Effect of Quantum Fluctuation on Two-Dimensional Spatially Anisotropic Heisenberg Antiferromagnet with Integer Spin

被引：0
|
作者：
JI An-Chun TIAN Guang-Shan School of Physics
机构：
来源：
CommunicationsinTheoreticalPhysics | 2006年 / 45卷 / 06期
基金：
中国国家自然科学基金;
关键词：
:spatially anisotropic Heisenberg model; functional integration; Schwinger boson representation;
D O I：
暂无
中图分类号：
O413.2 [量子电动力学];
学科分类号：
070201 ;
摘要：
Abstract In the present paper,we calculate the Gaussian correct ion to the critical value J;caused by quantum spinfluctuation in a two-dimensional spatially anisotropic Heisenberg antiferromagnet with integer spin S.Previously,someauthors computed this quantity by the mean-field theory based on the Schwinger boson representation of spin operators.However,for S=1,their result is much less than the one derived by numerical calculations.By taking the effect ofquantum spin fluctuation into consideration,we are able to produce a greatly improved result.
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页码：1137 / 1146
页数：10
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