石墨烯
物理
干扰(通信)
散射
凝聚态物理
振幅
符号(数学)
领域(数学)
相(物质)
磁场
光学
量子力学
电信
频道(广播)
计算机科学
数学分析
数学
纯数学
作者
A. V. Shytov,Mark S. Rudner,L. S. Levitov
标识
DOI:10.1103/physrevlett.101.156804
摘要
We present a theory of quantum-coherent transport through a lateral p-n-p structure in graphene, which fully accounts for the interference of forward and backward scattering on the p-n interfaces. The backreflection amplitude changes sign at zero incidence angle because of the Klein phenomenon, adding a phase pi to the interference fringes. The contributions of the two p-n interfaces to the phase of the interference cancel with each other at zero magnetic field, but become imbalanced at a finite field. The resulting half-period shift in the Fabry-Pérot fringe pattern, induced by a relatively weak magnetic field, can provide a clear signature of Klein scattering in graphene. This effect is shown to be robust in the presence of spatially inhomogeneous potential of moderate strength.
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