Bragg-Cherenkov scattering and nonlinear conductivity of a two-dimensional Wigner crystal

被引:56
|
作者
Dykman, MI
Rubo, YG
机构
[1] Department of Physics and Astronomy, Michigan State University, East Lansing, MI
关键词
D O I
10.1103/PhysRevLett.78.4813
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that the conductivity of 2D Wigner crystals displays strong nonlinearity. It arises from coherent many-electron Cherenkov emission of surface waves in the substrate (e.g., ripplons on helium) with the wave vectors q close to the reciprocal lattice vectors G of the electron solid. The rate of such Bragg-Cherenkov scattering sharply increases with the Wigner crystal velocity v as v . G approaches the surface wave frequency omega(G). The results are compared with recent experiments.
引用
收藏
页码:4813 / 4816
页数:4
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