Magneto-polarisability of mesoscopic rings

Details Magneto-polarisability of mesoscopic rings Magneto-polarisability of mesoscopic rings

1996-10-10

arxiv.org/abs/cond-mat/9610086v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

pages, Revtex, 1 eps figure

Scientific paper

10.1209/epl/i1996-00290-6

We calculate the average polarisability of two dimensional mesoscopic rings in the presence of an Aharonov-Bohm flux. The screening is taken into account self-consistently within a mean-field approximation. We investigate the effects of statistical ensemble, finite frequency and disorder. We emphasize geometrical effects which make the observation of field dependent polarisability much more favourable on rings than on disks or spheres of comparable radius. The ratio of the flux dependent to the flux independent part is estimated for typical GaAs rings.

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