Diamagnetic response of Aharonov-Bohm rings: Impurity backward scatterings

Details Diamagnetic response of Aharonov-Bohm rings: Impurity backward scatterings Diamagnetic response of Aharonov-Bohm rings: Impurity backward scatterings

2004-12-08

arxiv.org/abs/cond-mat/0412189v2

Phys. Rev. B 72, 085333 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

final version

Scientific paper

10.1103/PhysRevB.72.085333

We report a theoretical calculation on the persistent currents of disordered normal-metal rings. It is shown that the diamagnetic responses of the rings in the vicinity of the zero magnetic field are attributed to multiple backward scatterings off the impurities. We observe the transition from the paramagnetic response to the diamagnetic one as the strength of disorder grows using both the analytic calculation and the numerical exact diagonalization.

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