Magnetic Field Dependence of Dephasing Rate due to Diluted Kondo Impurities

Details Magnetic Field Dependence of Dephasing Rate due to Diluted Kondo Impurities Magnetic Field Dependence of Dephasing Rate due to Diluted Kondo Impurities

2006-10-11

arxiv.org/abs/cond-mat/0610304v3

Phys. Rev. B 75, 054406 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 13 figures; version accepted by Phys. Rev. B

Scientific paper

10.1103/PhysRevB.75.054406

We investigate the dephasing rate, 1/tau_phi, of weakly disordered electrons due to scattering from diluted dynamical impurities. Our previous result for the weak-localization dephasing rate is generalized from diluted Kondo impurities to arbitrary dynamical defects with typical energy transfer larger than 1/tau_phi. For magnetic impurities, we study the influence of magnetic fields on the dephasing of Aharonov-Bohm oscillations and universal conductance fluctuations both analytically and using the numerical renormalization group. These results are compared to recent experiments.

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