Electron transport and energy relaxation in dilute magnetic alloys
Abstract
We consider the effect of the RudermanKittelKasuyaYosida(RKKY) interaction between magnetic impurities on the electron relaxation rates in a normal metal. The interplay between the RKKY interaction and the Kondo effect may result in a nonmonotonic temperature dependence of the electron momentum relaxation rate, which determines the Drude conductivity. The electron phase relaxation rate, which determines the magnitude of the weaklocalization correction to the resistivity, is also a nonmonotonic function of temperature. For this function, we find the dependence of the position of its maximum on the concentration of magnetic impurities. We also relate the electron energy relaxation rate to the excitation spectrum of the system of magnetic impurities. The energy relaxation determines the distribution function for the outofequilibrium electrons. Measurement of the electron distribution function thus may provide information about the excitations in the spinglass phase.
 Publication:

Physical Review B
 Pub Date:
 August 2003
 DOI:
 10.1103/PhysRevB.68.075119
 arXiv:
 arXiv:condmat/0305240
 Bibcode:
 2003PhRvB..68g5119V
 Keywords:

 72.10.Fk;
 73.23.b;
 75.10.Nr;
 71.10.Ay;
 Scattering by point defects dislocations surfaces and other imperfections;
 Electronic transport in mesoscopic systems;
 Spinglass and other random models;
 Fermiliquid theory and other phenomenological models;
 Condensed Matter  Mesoscale and Nanoscale Physics;
 Condensed Matter  Disordered Systems and Neural Networks
 EPrint:
 15 pages, 5 figures