Piazza, Vincenzo and Beltram, Fabio and Wegscheider, Werner and Liang, Chi-Te and Pepper, M. (2000) Large transconductance oscillations in a single-well vertical Aharonov-Bohm interferometer. PHYSICAL REVIEW B, 62 (16). pp. 10630-10632. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
Aharonov-Bohm (AB) interference is reported for the first time in the conductance of a vertical nanostructure based on a single GaAs/AlxGa1-xAs quantum well (QW). The two lowest subbands of the well are spatially separated by the Hartree barrier originating from electronic repulsion in the modulation-doped QW and provide AB two-path geometry. Split-gates control the in-plane electronic momentum dispersion. In our system, we have clearly demonstrated AB interference in both electrostatic and magnetic modes. In the latter case the magnetic field was applied parallel to the QW plane, and perpendicular to the 0.02 mum(2) AB loop. In the electrostatic mode of operation the single-QW scheme adopted led to large transconductance oscillations with relative amplitudes exceeding 30%. The relevance of the present design strategy for the implementation of coherent nanoelectronic devices is underlined.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRON INTERFEROMETERS; QUANTUM; |
| 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: | 21 Mar 2022 15:30 |
| Last Modified: | 21 Mar 2022 15:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42140 |
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