Two-dimensional metal-insulator transition in smooth random magnetic fields

被引：18

作者：

Sheng, DN ^{[1
]}

Weng, ZY ^{[1
]}

机构：

[1] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA

来源：

EUROPHYSICS LETTERS | 2000年 / 50卷 / 06期

关键词：

D O I：

10.1209/epl/i2000-00548-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We re-examine the delocalization problem of two-dimensional electrons in the presence of random magnetic fields. By introducing short-range spatial correlations among random fluxes, a well-defined metal-insulator transition characterized by a two-brunch scaling of conductance has been demonstrated numerically. Critical conductance is found non-universal with a value around e(2)/h. interesting connections of this system with the recently observed B = 0 two-dimensional metallic phase (Kravchenko et al. Phys. nev. B, 50 (1994) 8039) are also discussed.

引用

页码：776 / 781

页数：6

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