Persistent and radiation-induced currents in distorted quantum rings
摘要
Persistent and radiation-induced currents in distorted narrow quantum rings are theoretically investigated. We show that ring distorsions can be described using a geometrical potential term. We analyse the effect of this term on the current induced by a magnetic flux (persistent current) and by a polarized coherent electromagnetic field (radiation-induced current). The strongest effects in persistent currents are observed for distorted rings with a small number of electrons. The distortion smoothes the current oscillations as a function of the magnetic flux and changes the temperature dependence of the current amplitude. For radiation-induced currents, the distortion induces an ac component in the current and affects its dependence on the radiation frequency and intensity.
引用
@article{arxiv.cond-mat/0506187,
title = {Persistent and radiation-induced currents in distorted quantum rings},
author = {Yuriy V. Pershin and Carlo Piermarocchi},
journal= {arXiv preprint arXiv:cond-mat/0506187},
year = {2007}
}