Klein Tunneling in Deformed Honeycomb Lattices

被引：140

作者：

Bahat-Treidel, Omri ^{[1
]}

Peleg, Or ^{[1
]}

Grobman, Mark ^{[1
]}

Shapira, Nadav ^{[1
]}

Segev, Mordechai ^{[1
]}

Pereg-Barnea, T. ^{[2
]}

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Technion, Haifa, Israel

[2] CALTECH, Dept Phys, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 06期

基金：

欧洲研究理事会; 以色列科学基金会;

关键词：

GRAPHENE;

D O I：

10.1103/PhysRevLett.104.063901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the scattering of waves off a potential step in deformed honeycomb lattices. For deformations below a critical value, perfect Klein tunneling is obtained; i.e., a potential step transmits waves at normal incidence with nonresonant unit-transmission probability. Beyond the critical deformation a gap forms in the spectrum, and a potential step perpendicular to the deformation direction reflects all normally incident waves, exhibiting a dramatic transition form unit transmission to total reflection. These phenomena are generic to honeycomb lattices and apply to electromagnetic waves in photonic lattices, quasiparticles in graphene, and cold atoms in optical lattices.

引用

页数：4

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