Anomalous negative magnetoresistance caused by non-Markovian effects

被引：20

作者：

Cheianov, VV

Dmitriev, AP

Kachorovskii, VY

机构：

[1] NORDITA, DK-2100 Copenhagen, Denmark

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.68.201304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A theory of recently discovered anomalous low-field magnetoresistance is developed for the system of two-dimensional electrons scattered by hard disks of radius a, randomly distributed with concentration n. For small magnetic fields the magnetoresistance is found to be parabolic and inversely proportional to the gas parameter, deltarho(xx)/rhosimilar to-(omega(c)tau)(2)/na(2). With increasing field the magnetoresistance becomes linear deltarho(xx)/rhosimilar to-omega(c)tau in a good agreement with the experiment and numerical simulations.

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页数：4

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