paper

Electron Pair Resonance in the Coulomb Blockade

arXiv:0707.2892 · doi:10.1103/PhysRevLett.100.056809

Abstract

We study many-body corrections to the cotunneling current via a localized state with energy $I^µ_{d}$ at large bias voltages $V$ . We show that the transfer of {\em electron pairs}, enabled by the Coulomb repulsion in the localized level, results in ionization resonance peaks in the third derivative of the current with respect to $V$ , centered at $e V = \pm 2 I^µ_{d} /3$ . Our results predict the existence of previously unnoticed structure within Coulomb-blockade diamonds.

5 pages, 4 figures