Is the magnetic field necessary for the Aharonov-Bohm effect in mesoscopics?

Details Is the magnetic field necessary for the Aharonov-Bohm effect in mesoscopics? Is the magnetic field necessary for the Aharonov-Bohm effect in mesoscopics?

1997-12-04

arxiv.org/abs/cond-mat/9712057v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, Latex

Scientific paper

10.1103/PhysRevLett.80.2417

A new class of topological mesoscopic phenomena in absence of external magnetic field (meso-nucleo-spinics)is predicted, which is based on combined action of the nonequilibrium nuclear spin population and charge carriers spin-orbit interaction . As an example, we show that Aharonov-Bohm like oscillations of the persistent current in GaAs/AlGaAs based mesoscopic rings may exist, in the absence of the external magnetic field, provided that a topologically nontrivial strongly nonequilibrium nuclear spin population is created. This phenomenon is due to the breaking, via the spin-orbit coupling, of the clock wise - anti clock wise symmetry of the charge carriers momentum, which results in the oscillatory in time persistent current.

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