Single electron-phonon interaction in a suspended quantum dot phonon cavity

Details Single electron-phonon interaction in a suspended quantum dot phonon cavity Single electron-phonon interaction in a suspended quantum dot phonon cavity

2003-04-06

arxiv.org/abs/cond-mat/0304136v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

An electron-phonon cavity consisting of a quantum dot embedded in a free-standing GaAs/AlGaAs membrane is characterized in Coulomb blockade measurements at low temperatures. We find a complete suppression of single electron tunneling around zero bias leading to the formation of an energy gap in the transport spectrum. The observed effect is induced by the excitation of a localized phonon mode confined in the cavity. This phonon blockade of transport is lifted at magnetic fields where higher electronic states with nonzero angular momentum are brought into resonance with the phonon energy.

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