Electron Supercollimation in Graphene and Dirac Fermion Materials Using One-Dimensional Disorder Potentials

被引:23
作者
Choi, SangKook [1 ,2 ]
Park, Cheol-Hwan [1 ,2 ,3 ,4 ]
Louie, Steven G. [1 ,2 ]
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
[3] Seoul Natl Univ, Dept Phys, Seoul 151747, South Korea
[4] Seoul Natl Univ, Ctr Theoret Phys, Seoul 151747, South Korea
基金
美国国家科学基金会;
关键词
CARBON NANOTUBES; CRYSTALS;
D O I
10.1103/PhysRevLett.113.026802
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Electron supercollimation, in which a wave packet is guided to move undistorted along a selected direction, is a highly desirable property that has yet to be realized experimentally. Disorder in general is expected to inhibit supercollimation. Here we report a counterintuitive phenomenon of electron supercollimation by disorder in graphene and related Dirac fermion materials. We show that one can use one-dimensional disorder potentials to control electron wave packet transport. This is distinct from known systems where an electron wave packet would be further spread by disorder and hindered in the potential fluctuating direction. The predicted phenomenon has significant implications in the understanding and applications of electron transport in Dirac fermion materials.
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页数:5
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