Bragg-Cherenkov Scattering and Nonlinear Conductivity in a Two-Dimensional Wigner Crystal.
Bragg-Cherenkov Scattering and Nonlinear Conductivity in a Two-Dimensional Wigner Crystal.
复制标题
二维维格纳晶体中的布拉格-切伦科夫散射和非线性电导率。
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Y. G. Rubo
中科院分区：
文献类型：
--
作者：
M. Dykman;Y. G. Rubo
结果表明，二维维格纳晶体的电导率表现出很强的非线性。它源于衬底中表面波(如氦上的涟漪)的相干多电子切伦科夫发射，其中波矢Q接近电子固体的倒易晶格矢量G。这种Bragg-Cherenkov散射率随着维格纳晶体速度y的增加而急剧增加。G接近面波频率vsGd。将计算结果与最近的实验结果进行了比较。[S0031-9007(97)03468-6]
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 y as v ? G approaches the surface wave frequency vsGd. The results are compared with recent experiments. [S0031-9007(97)03468-6]