| Heat Conductivity in a Two-Dimensional Finite-Size Spin System with Dzyaloshinskii-Moriya Interactions |
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| 引用本文： | 刘会平 孙运周 易林. Heat Conductivity in a Two-Dimensional Finite-Size Spin System with Dzyaloshinskii-Moriya Interactions[J]. 中国物理快报, 2006, 23(7): 1713-1715 |
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| 作者姓名： | 刘会平 孙运周 易林 |
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| 作者单位： | Department of Physics and State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074 |
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| 基金项目： | Supported by the Natural Science Foundation of Hubei Province under Grant No 2003ABA004. |
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| 摘 要： | Heat conductivity is studied by direct numerical simulations in a two-dimensional model with chiral Dzyaloshinskii-Moriya （DM） spin superexchange interactions for various DM strengths and finite sizes. We find that when temperature is not too low, the thermal conductivity can be well described in the semi-classical spin wave picture, and connections of thermal conductivity with the specific heat and the dynamic relaxation time are verified to be suitable. In particular, the transition arising in Sr14-xCaxCu24O41 is related to a magnetic spin glass and qualitatively understood as a kind of Kosterlitz-Thouless transitions. It is shown that the critical temperature is linearly dependent on the spin-spin interactions for the relevant strong DM strength.
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| 关 键 词： | 热传导性 二维空间有限尺寸自旋系统 Dzyaloshinskii-Moriya交互作用 数字模拟 |
| 收稿时间： | 2006-01-11 |
| 修稿时间： | 2006-01-11 |
Heat Conductivity in a Two-Dimensional Finite-Size Spin System with Dzyaloshinskii-Moriya Interactions |
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| LIU Hui-Ping, SUN Yun-Zhou, YI Lin. Heat Conductivity in a Two-Dimensional Finite-Size Spin System with Dzyaloshinskii-Moriya Interactions[J]. Chinese Physics Letters, 2006, 23(7): 1713-1715 |
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| Authors: | LIU Hui-Ping SUN Yun-Zhou YI Lin |
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