期刊
NEW JOURNAL OF PHYSICS
卷 25, 期 11, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1367-2630/ad0c85
关键词
Wigner crystal; ratchet; nonlinear transport
In this study, we investigate a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field. An applied external ac drive can induce a ratchet effect at zero magnetic field, and the addition of a magnetic field leads to new behaviors, including transverse ratchet motion. The system also exhibits commensuration effects and nonmonotonic ratchet efficiency.
We examine a charge lattice coupled to a one-dimensional asymmetric potential in the presence of an applied magnetic field, which induces gyrotropic effects in the charge motion. This system could be realized for Wigner crystals in nanostructured samples, dusty plasmas, or other classical charge-ordered states where gyrotropic motion and damping can arise. For zero magnetic field, an applied external ac drive can produce a ratchet effect in which the particles move along the easy flow direction of the substrate asymmetry. The zero field ratchet effect can only occur when the ac drive is aligned with the substrate asymmetry direction; however, when a magnetic field is added, the gyrotropic forces generate a Hall effect that leads to a variety of new behaviors, including a transverse ratchet motion that occurs when the ac drive is perpendicular to the substrate asymmetry direction. We show that this system exhibits commensuration effects as well as reversals in the ratchet effect and the Hall angle of the motion. The magnetic field also produces a nonmonotonic ratchet efficiency when the particles become localized at high fields.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据