Roddaro, Stefano and Piazza, Vincenzo and Beltram, Fabio and Wegscheider, Werner and Liang, Chi-Te and Pepper, Michael (2002) Magnetotransport in variable-coupling one-dimensional ballistic constrictions. JOURNAL OF APPLIED PHYSICS, 92 (9). pp. 5304-5309. ISSN 0021-8979
Full text not available from this repository.Abstract
A scheme to produce closely spaced high-quality one-dimensional electronic channels is presented. It is based on standard nanolithography fabrication applied to a single, wide quantum well AlGaAs/GaAs heterostructure where the spatial separation of the wire modes is given by Coulomb repulsion. The lack of a composition-induced barrier in the double layer leads to electron mobility of 5x10(6) cm(2)/Vs in the starting double two-dimensional system. This in turn yields high-quality one-dimensional channels following nanolithography, as shown by our detailed analysis of the magnetotransport properties of the system. Variable coupling is achieved by split-gate polarization and external magnetic-field intensity and orientation. The relevance for the implementation of coherent nanodevices of this fabrication approach is discussed. (C) 2002 American Institute of Physics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM POINT CONTACTS; ELECTRON-TRANSPORT; MAGNETIC-FIELD; WIRES; HETEROJUNCTION; FABRICATION; CONDUCTANCE; STATES; GAS; |
| 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: | 26 Aug 2021 13:02 |
| Last Modified: | 26 Aug 2021 13:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39730 |
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