Electrons in disordered systems. Scaling near the mobility edge
Electrons in disordered systems. Scaling near the mobility edge
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DOI：
10.1007/bf01315248
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发表时间：
1976-12
期刊：
影响因子：
--
通讯作者：
F. Wegner
中科院分区：
文献类型：
--
作者：
F. Wegner
重整化群自变量被应用于无序电子系统的系综(没有电子-电子相互作用)。重整化群过程包括一系列长度和能量标度的变换，以及电子态的正交变换。对于各种单粒子和双粒子关联以及迁移率边缘附近的低温电导率，得到了均匀性和幂定律。提出了两种类型的不动点系综，一种是用细胞模型近似的齐次系综，另一种是非齐次系综。
Renormalization group arguments are applied to an ensemble of disordered electronic systems (without electron-electron interaction). The renormalization group procedure consists of a sequence of transformations of the length and the energy scales, and of orthogonal transformations of the electronic states. Homogeneity and power laws are obtained for various one and two-particle correlations and for the low-temperature conductivity in the vicinity of the mobility edge. Two types of fixed point ensembles are proposed, a homogeneous ensemble which is roughly approximated by a cell model, and an inhomogeneous ensemble.