Non-linear electrical conductivity and sliding in a two-dimensional electron crystal on liquid helium
Non-linear electrical conductivity and sliding in a two-dimensional electron crystal on liquid helium
复制标题
液氦上二维电子晶体的非线性电导率和滑动
DOI：
10.1088/0953-8984/11/48/328
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
W. Vinen
中科院分区：
文献类型：
--
作者：
W. Vinen
在足够低的温度下，液氦表面的电子形成经典的维格纳晶体。只要电子漂移速度不是太大，电子晶格会使氦表面变形，形成一个凹坑晶格，这会导致电子有效质量的增加。该系统被观察到表现出复杂的非线性磁导率，我们讨论了一个简单的经典模型。该模型显示在一个统一的方式的影响，已分别处理由其他作者：布拉格-切伦科夫散射的毛细波，和去耦的电子在高电场（滑动）的酒窝。我们的研究结果与其他作者的研究结果有很大不同。
At a sufficiently low temperature electrons on the surface of liquid helium form a classical Wigner crystal. As long as the electron drift velocity is not too large the electron lattice distorts the helium surface to form a lattice of dimples, which leads to an enhanced electron effective mass. This system is observed to exhibit a complicated non-linear magnetoconductivity, which we discuss in terms of a simple classical model. The model displays in a unified way the effects of two phenomena that have been treated separately by other authors: Bragg-Cerenkov scattering of capillary waves, and decoupling of the electrons from the dimples at high electric fields (sliding). Our results differ in important ways from those of the other authors.