Senz, V. and Heinzel, T. and Ihn, T. and Lindemann, S. and Held, R. and Ensslin, K. and Wegscheider, Werner and Bichler, M. (2001) Analysis of the temperature-dependent quantum point contact conductance in relation to the metal-insulator transition in two dimensions. JOURNAL OF PHYSICS-CONDENSED MATTER, 13 (17). pp. 3831-3837. ISSN 0953-8984
Full text not available from this repository.Abstract
The temperature dependence of the conductance of a quantum point contact has been measured. The conductance as a function of the Fermi energy shows temperature-independent fixed points, located at roughly multiple integers of e(2)/h. Around the first fixed point at e(2)/h, the experimental data for different temperatures can be scaled onto a single curve. For pure thermal smearing of the conductance steps, a scaling parameter of one is expected. The measured scaling parameter, however, is significantly larger than 1. The deviations are interpreted as a signature of the potential landscape of the quantum point contact, and of the source-drain bias voltage. We relate our results phenomenologically to the metal-insulator transition in two dimensions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTRON-GAS; 2 DIMENSIONS; CONSTRICTION; QUANTIZATION; LOCALIZATION; PERCOLATION; FIELD; B=0; |
| 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: | 01 Feb 2022 15:56 |
| Last Modified: | 01 Feb 2022 15:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41488 |
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