CROSSOVER EXPONENT FOR A WEAK MAGNETIC-FIELD AT THE LOCALIZATION ORTHOGONAL FIXED-POINT

被引：9
|
作者：
BIAFORE, M [1 ]
CASTELLANI, C [1 ]
KOTLIAR, G [1 ]
机构：
[1] RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08854
来源：
NUCLEAR PHYSICS B | 1990年 / 340卷 / 2-3期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0550-3213(90)90461-L
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We re-examine the non-linear σ-model lagrangian for the soft modes of non-interacting electrons in a disordered system in a weak magnetic field, close to two dimensions. The magnetic field is shown to induce two scaling terms in the low-energy lagrangian. The crossover exponents are computed by using a Wilson-Polyakov non-linear renormalization group. The largest one agrees to lowest order with the exponent expected from naive scaling arguments. © 1990.
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页码：617 / 632
页数：16
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