Selective transmission of Dirac electrons and ballistic magnetoresistance of n-p junctions in graphene

被引:637
作者
Cheianov, Vadim V. [1 ]
Fal'ko, Vladimir I. [1 ]
机构
[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
来源
PHYSICAL REVIEW B | 2006年 / 74卷 / 04期
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1103/PhysRevB.74.041403
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We show that an electrostatically created n-p junction separating the electron and hole gas regions in a graphene monolayer transmits only those quasiparticles that approach it almost perpendicularly to the n-p interface. Such a selective transmission of carriers by a single n-p junction would manifest itself in nonlocal magnetoresistance effect in arrays of such junctions and determines the unusual Fano factor in the current noise universal for the n-p junctions in graphene.
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