Persistent current in superconducting nanorings

Preprint

11 July 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0207277

Abstract

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.

Keywords

NANORINGS THE SUPERCONDUCTIVITY
PERSISTENT CURRENT
ENERGY PROPERTIES
SUPERCONDUCTING
QUANTUM PHASE
PHASE SLIPS
THIN RINGS
TWISTED

All Related Versions

Version 1, 2002-07-11, ArXiv
Published version: Physical Review Letters, 89 (9), 096802.

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