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Electromechanical noise in a diffusive conductor

A. V. Shytov·L. S. Levitov·C. W. J. Beenakker
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Abstract

Electrons moving in a conductor can transfer momentum to the lattice via collisions with impurities and boundaries, giving rise to a fluctuating mechanical stress tensor. The root-mean-squared momentum transfer per scattering event in a disordered metal (of dimension L greater than the mean free path l and screening length xi) is found to be reduced below the Fermi momentum by a factor of order l/L for shear fluctuations and (xi/L)^2 for pressure fluctuations. The excitation of an elastic bending mode by the shear fluctuations is estimated to fall within current experimental sensitivity for a nanomechanical oscillator.

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A. V. Shytov, L. S. Levitov, C. W. J. Beenakker. 2001-10-29. Electromechanical noise in a diffusive conductor. https://doi.org/10.1103/physrevlett.88.228303

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