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Phase coherence in the Inelastic Cotunneling Regime

Sigrist, Martin, Ihn, Thomas, Ensslin, Klaus, Loss, Daniel, Reinwald, Matthias and Wegscheider, Werner (2006) Phase coherence in the Inelastic Cotunneling Regime. Physical Review Letters 96, 036804.

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Two quantum dots with tunable mutual tunnel coupling have been embedded in a two-terminal Aharonov-Bohm geometry. Aharonov-Bohm oscillations investigated in the cotunneling regime demonstrate coherent tunneling through nonresonant states. 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 is detected as a function of bias voltage at the inelastic cotunneling onset.

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Item type:Article
Date:January 2006
Institutions:Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider
Projects:nanoQUIT, SFB 631: Festkörperbasierte Quanteninformationsverarbeitung
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Dewey Decimal Classification:500 Science > 530 Physics
Refereed:Yes, this version has been refereed
Created at the University of Regensburg:Yes
Item ID:1794
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