Coherent Probing of Excited Quantum Dot States in an Interferometer

DOI to cite this document:: 10.5283/epub.12470

Sigrist, Martin ; Ihn, Thomas ; Ensslin, Klaus ; Reinwald, Matthias ; Wegscheider, Werner

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Date of publication of this fulltext: 25 Jan 2010 13:45

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Abstract

Measurements of elastic and inelastic cotunneling currents are presented on a two-terminal Aharonov-Bohm interferometer with a Coulomb-blockaded quantum dot embedded in each arm. Coherent current contributions, even in a magnetic field, are found in the nonlinear regime of inelastic cotunneling at a finite-bias voltage. The phase of the Aharonov-Bohm oscillations in the current exhibits phase ...