Persistent current in superconducting nanorings
介观与纳米尺度物理
2009-11-07 v1 超导电性
摘要
The superconductivity in very thin rings is suppressed by quantum phase slips. As a result the amplitude of the persistent current oscillations with flux becomes exponentially small, and their shape changes from sawtooth to a sinusoidal one. We reduce the problem of low-energy properties of a superconducting nanoring to that of a quantum particle in a sinusoidal potential and show that the dependence of the current on the flux belongs to a one-parameter family of functions obtained by solving the respective Schrodinger equation with twisted boundary conditions.
引用
@article{arxiv.cond-mat/0207277,
title = {Persistent current in superconducting nanorings},
author = {K. A. Matveev and A. I. Larkin and L. I. Glazman},
journal= {arXiv preprint arXiv:cond-mat/0207277},
year = {2009}
}
备注
5 pages, 1 figure