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
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 25期
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.
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页码：4813 / 4816
页数：4
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