Berry phase and persistent current in disordered mesoscopic rings

Details Berry phase and persistent current in disordered mesoscopic rings Berry phase and persistent current in disordered mesoscopic rings

1999-08-30

arxiv.org/abs/cond-mat/9908440v1

Phys. Rev. B 60 (1999) R8457-R8460

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, RevTeX, 2 figures. To appear in Phys. Rev. B Rapid Communications Vol.60 No.12 (1999)

Scientific paper

10.1103/PhysRevB.60.R8457

A novel quantum interference effect in disordered quasi-one-dimensional rings in the inhomogeneous magnetic field is reported. We calculate the canonical disorder averaged persistent current using the diagrammatic perturbation theory. It is shown that within the adiabatic regime the average current oscillates as a function of the geometric flux which is related to the Berry phase and the period becomes half the value of the case of a single one-dimensional ring. We also discuss the magnetic dephasing effect on the averaged current.

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