Sigrist, Martin and Ihn, Thomas and Ensslin, Klaus and Reinwald, Matthias and Wegscheider, Werner (2007) Coherent probing of excited quantum dot states in an interferometer. PHYSICAL REVIEW LETTERS, 98 (3): 036805. ISSN 0031-9007,
Full text not available from this repository.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 jumps of pi at the onsets of inelastic processes. We suggest that additional coherent elastic processes occur via the excited state. Our measurement technique allows the detection of such processes on a background of other inelastic current contributions and contains qualitative information about the ratio of transport and inelastic relaxation rates.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Dec 2020 07:38 |
| Last Modified: | 23 Dec 2020 07:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33289 |
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