| 三维量子自旋玻璃理论(Ⅰ)——稳态Replica对称近似 |
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| 引用本文： | 易林,姚凯伦. 三维量子自旋玻璃理论(Ⅰ)——稳态Replica对称近似[J]. 物理学报, 1993, 42(3): 488-495 |
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| 作者姓名： | 易林 姚凯伦 |
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| 作者单位： | (1)华中理工大学物理系,武汉430074; (2)中国高等科学技术中心(世界实验室),北京100080 |
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| 基金项目： | 国家自然科学基金;德国SFB No.166基金 |
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| 摘 要： | 利用虚时泛函积分技术和Replica方法,建立了具有Dazyaloshinskii-Moriya各向导性和铁磁相互作用的三维量子自旋玻璃理论。在稳态Replica对称近似下,确定了自旋自相互作用、自旋玻璃序参量和磁化强度的自洽方程组,获得了对角磁化率与序参数间的关系,给出了与序参数有关的自由能密度,克服了有关理论的低温失效。关键词：
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| 关 键 词： | 自旋玻璃 磁化率 自由能 序参数 |
| 收稿时间： | 1992-02-02 |
THEORY OF THREE-DIMENSIONAL QUANTUM SPIN GLASS (I)——STATIC REPTICA SYMMETRY APPROACH |
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| YI LIN and YAO KAI-LUN. THEORY OF THREE-DIMENSIONAL QUANTUM SPIN GLASS (I)——STATIC REPTICA SYMMETRY APPROACH[J]. Acta Physica Sinica, 1993, 42(3): 488-495 |
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| Authors: | YI LIN and YAO KAI-LUN |
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| Abstract: | By employing the imaginary time functional technique and the so-called replica method, a quantum vector spin glass model with random Dzyaloshinskii-Moriya anisotropy and ferro-magnetic interaction is investigated for any spin quantum numbers. In the static replica sym-metry limit, the spin self-interaction order parameters, the spin glass order parameters and the magnetization are all determined self-consistently. The relation between susceptibility tensors and order parameters is set up. Compared with other methods, our theory works at all tempe-ratures. |
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