Coulomb singularity effects in tunnelling spectroscopy of individual impurities
Arseyev, P. I.
Maslova, N. S.
Panov, V. I.
Savinov, S. V.
arxiv: Condensed Matter::Superconductivity | Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Non-equilibrium Coulomb effects in resonant tunnelling processes through deep impurity states are analyzed. It is shown that Coulomb vertex corrections to the tunnelling transfer amplitude lead to a power-law singularity in current- voltage characteristics