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Persistent current in superconducting nanorings | | K.A. Matveev
; A.I. Larkin
; L.I. Glazman
; | | Date: |
11 Jul 2002 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Superconductivity | cond-mat.mes-hall cond-mat.supr-con | | 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. | | Source: | arXiv, cond-mat/0207277 | | Services: | Forum | Review | PDF | Favorites | |
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