Interaction-induced dephasing of Aharonov-Bohm oscillations

Details Interaction-induced dephasing of Aharonov-Bohm oscillations Interaction-induced dephasing of Aharonov-Bohm oscillations

2003-12-12

arxiv.org/abs/cond-mat/0312325v2

Phys. Rev. B 69, 193306 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures. Minor changes, final version published in PRB

Scientific paper

10.1103/PhysRevB.69.193306

We study the effect of the electron-electron interaction on the amplitude of mesoscopic Aharonov-Bohm oscillations in quasi-one-dimensional (Q1D) diffusive rings. We show that the dephasing length L_phi^AB governing the damping factor exp(-2piR / L_phi^AB) of the oscillations is parametrically different from the common dephasing length for the Q1D geometry. This is due to the fact that the dephasing is governed by energy transfers determined by the ring circumference 2piR, making L_phi^AB R-dependent.

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