Single-Electron-Phonon Interaction in a Suspended Quantum Dot Phonon Cavity

DOI to cite this document:: 10.5283/epub.11498

Weig, E. M. ; Blick, Robert H. ; Brandes, T. ; Kirschbaum, Jochen ; Wegscheider, Werner ; Bichler, Max ; Kotthaus, J. P.

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Date of publication of this fulltext: 15 Dec 2009 08:50

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Abstract

An electron-phonon cavity consisting of a quantum dot embedded in a freestanding GaAs/AlGaAs membrane is characterized using 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 ...