Finite Temperature Drude Weight of the One-Dimensional Spin- 1 / 2 Heisenberg Model
Finite Temperature Drude Weight of the One-Dimensional Spin- 1 / 2 Heisenberg Model
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DOI：
10.1103/physrevlett.82.1764
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发表时间：
1998-11
影响因子：
8.6
通讯作者：
X. Zotos
中科院分区：
文献类型：
--
作者：
X. Zotos
利用Bethe近似方法，分析了易平面反铁磁海森堡模型中零频率分量（Drude重量）对自旋流关联的贡献. Drude重量是温度的单调递减函数，对于所有0<Delta< 1，它以幂律接近零温度值，并且对于各向同性Delta=1点处的所有有限温度，它似乎为零。
Using the Bethe ansatz method, the zero frequency contribution (Drude weight) to the spin current correlations is analyzed for the easy plane antiferromagnetic Heisenberg model. The Drude weight is a monotonically decreasing function of temperature for all 0<Delta< 1, it approaches the zero temperature value with a power law and it appears to vanish for all finite temperatures at the isotropic Delta=1 point.