Phys. Rev. B 72, 085333 (2005) [5 pages]Diamagnetic response of Aharonov-Bohm rings: Impurity backward scatteringReceived 13 June 2005; revised 29 June 2005; published 17 August 2005 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 scattering 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.72.085333
DOI:
10.1103/PhysRevB.72.085333
PACS:
73.23.Ra, 73.21.Hb
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