Theory of spin noise spectroscopy of itinerant fermions

ORAL

Abstract

We study the noise of spin magnetization in a region within a system of fermions in different regimes of temperature (degenerate/non-degenerate) and disorder (ballistic/diffusive), with and without spin-flip processes included, and with no particle-particle interactions. We obtain a single spectral line, analyze the dependence of its width and spectral weight on the parameters of the system and the size of the region of interest, and discuss conditions for the maximal effect. We compare our results to the recent measurements of spin noise of alkali-gas vapor and of conduction electrons in a GaAs epilayer.

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Authors

  • Simon Kos

    University of Cambridge

  • A. V. Balatsky

    LANL, Los Alamos National Laboratory

  • S. A. Crooker

    Los Alamos National Laboratory, Los Alamos National Laboratory, New Mexico, National High Magnetic Field Laboratory, Los Alamos, New Mexico

  • Peter B. Littlewood

    University of Cambridge, Cavendish Lab., Univ. of Cambridge

  • Dwight Rickel

    Los Alamos National Laboratory

  • Darryl Smith

    Los Alamos National Laboratory