Electromechanical noise in a diffusive conductor

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.

4 pages including 1 figure

References in corpus (6)

• Shot Noise in Mesoscopic Conductors
• Bolometric detection of mechanical bending waves in suspended carbon nanotubes
• Charge Fluctuations in Quantum Point Contacts and Chaotic Cavities in the Presence of Transport
• Long-Range Coulomb Interaction and Frequency Dependence of Shot Noise in Mesoscopic Diffusive Contacts
• Uncertainty-principle noise in vacuum-tunneling transducers
• Perturbation of Tunneling Processes by Mechanical Degrees of Freedom in Mesoscopic Junctions

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• Surface dissipation in nanoelectromechanical systems: Unified description with the standard tunneling model and effects of metallic electrodes
• Charge transport through a SET with a mechanically oscillating island
• Quantum theory of electromechanical noise and momentum transfer statistics
• Conductance noise in interacting Anderson insulators driven far from equilibrium
• Casimir-like tunneling-induced electronic forces
• De Haas-van Alphen effect in graphene
• Momentum noise in a quantum point contact