Electron-electron scattering and nonequilibrium noise in Sharvin contacts

Details Electron-electron scattering and nonequilibrium noise in Sharvin contacts Electron-electron scattering and nonequilibrium noise in Sharvin contacts

2011-03-30

arxiv.org/abs/1103.5899v1

JETP Letters 94, 53 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

We consider wide ballistic microcontacts with electron-electron scattering in the leads and calculate electric noise and nonlinear conductance in them. Due to a restricted geometry the collisions of electrons result in a shot noise even though they conserve the total momentum of electrons. We obtain the noise and the conductivity for arbitrary relations between voltage V and temperature T. The positive inelastic correction to the Sharvin conductance is proportional to T at low voltages eV << T, and to |V| at high voltages. At low voltages the noise is defined by the Nyquist relation and at high voltages the noise is related with the inelastic correction to the current by the Shottky formula S_{in} = 2eI_{in}.

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