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Phase coherence in the inelastic cotunneling regime

M. Sigrist·T. Ihn·K. Ensslin·D. Loss·M. Reinwald·W. Wegscheider
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Abstract

Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry. Aharonov-Bohm oscillations are investigated in the cotunneling regime. Visibilities of more than 0.8 are measured indicating that phase-coherent processes are involved in the elastic and inelastic cotunneling. An oscillation-phase change of pi is detected as a function of bias voltage at the inelastic cotunneling onset.

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M. Sigrist, T. Ihn, K. Ensslin, D. Loss, M. Reinwald, W. Wegscheider. 2005-08-31. Phase coherence in the inelastic cotunneling regime. https://doi.org/10.1103/physrevlett.96.036804

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