Zero bias anomaly out of equilibrium
arXiv:0704.0728 · doi:10.1103/PhysRevLett.100.086801
Abstract
The non-equilibrium zero bias anomaly (ZBA) in the tunneling density of states of a diffusive metallic film is studied. An effective action describing virtual fluctuations out-of-equilibrium is derived. The singular behavior of the equilibrium ZBA is smoothed out by real processes of inelastic scattering.
4 pages