Effect of Quantum Fluctuation on Two-Dimensional Spatially Anisotropic Heisenberg Antiferromagnet with Integer Spin |
| |
Authors: | JI An-Chun and TIAN Guang-Shan |
| |
Institution: | School of Physics, Peking University, Beijing 100871, China |
| |
Abstract: | In the present paper, we calculate the Gaussian correction to the critical value J⊥c caused by quantum spin fluctuation in a two-dimensional spatially anisotropic Heisenberg antiferromagnet with integer spin S. Previously, some authors 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 of quantum spin fluctuation into consideration, we are able to produce a greatly improved result. |
| |
Keywords: | spatially anisotropic Heisenberg model functional integration Schwinger boson representation |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|