Spin-wave-induced correction to the conductivity of ferromagnets

J. Danon, A. Ricottone, and P. W. Brouwer
Phys. Rev. B 90, 024405 – Published 11 July 2014

Abstract

We calculate the correction to the conductivity of a disordered ferromagnetic metal due to spin-wave-mediated electron-electron interactions. This correction is the generalization of the Altshuler-Aronov correction to spin-wave-mediated interactions. We derive a general expression for the conductivity correction to lowest order in the spin-wave-mediated interaction and for the limit that the exchange splitting Δ is much smaller than the Fermi energy. For a “clean” ferromagnet with Δτel/1, with τel being the mean time for impurity scattering, we find a correction δσT5/2 at temperatures T above the spin-wave gap. In the opposite, “dirty” limit, Δτel/1, the correction is a nonmonotonous function of temperature.

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  • Received 23 April 2014

DOI:https://doi.org/10.1103/PhysRevB.90.024405

©2014 American Physical Society

Authors & Affiliations

J. Danon1,2, A. Ricottone2, and P. W. Brouwer2

  • 1Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark
  • 2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

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Vol. 90, Iss. 2 — 1 July 2014

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