Shot noise in mesoscopic diffusive conductors in the limit of strong electron-electron scattering

Abstract

The shot-noise power of a diffusive conductor in a presence of both strong inelastic electron-electron and electron-phonon scattering is calculated. It is shown that electron-electron inelastic scattering does not suppress shot noise strongly and the noise power has a universal form (\ensuremath{\surd}3/2)e\ensuremath{\Vert}I\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\Vert}. Effective electron-phonon scattering leads to a strong suppression of the shot noise. Good agreement of our results with a recent experiment by Liefrink et al. [Phys. Rev. B 49, 14 066 (1994)] is found.