Electron Pair Resonance in the Coulomb Blockade

Details Electron Pair Resonance in the Coulomb Blockade Electron Pair Resonance in the Coulomb Blockade

2007-07-19

arxiv.org/abs/0707.2892v1

Phys. Rev. Lett. 100, 056809 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.056809

We study many-body corrections to the cotunneling current via a localized state with energy $\epsilon_d$ 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 $eV=\pm 2\epsilon_d/3$. Our results predict the existence of previously unnoticed structure within Coulomb-blockade diamonds.

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