Electromechanical noise in a diffusive conductor

Details Electromechanical noise in a diffusive conductor Electromechanical noise in a diffusive conductor

2001-10-29

arxiv.org/abs/cond-mat/0110593v1

Phys.Rev.Lett. 88, 228303 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages including 1 figure

Scientific paper

10.1103/PhysRevLett.88.228303

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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