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Coulomb singularity effects in tunnelling spectroscopy of individual impurities

P. I. Arseyev, N. S. Maslova, V. I. Panov, S. V. Savinov

cond-matarXiv:cond-mat/0209212

Abstract

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

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