Habl, Matthias and Wegscheider, W. (2008) Laterally coupled and field-induced quantum Hall systems. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 245 (2). pp. 260-275. ISSN 0370-1972,
Full text not available from this repository. (Request a copy)Abstract
A quantum Hall system which is divided into two laterally coupled subsystems by means of a tunneling barrier exhibits a complex Landau le cl dispersion. Magnetotunneling spectroscopy is employed to investigate the small energy gaps which separate subsequent Landau bands. The control on the Fermi level permits to trace the anticrossings for varying magnetic fields. The band structure calculation predicts a magnetic shift of the band gaps on the scale of the cyclotron energy. This effect is confirmed experimentally by a displacement of the conductance peaks on the axis of the filling factor. Tunneling centers within the barrier are responsible for quantum interferences between opposite edge channels. Due to the disorder potential, the corresponding, Aharonov-Bohm interferometers generate additional long-period and irregular conductance features. In the regime of strong localization, conductance fluctuations occur at small magnetic, fields before the onset of the regular Landau oscillations. The Landau dispersion is obtained by a dedicated algorithm which solves the Schrodinger equation exactly for a single electron residing in a quantum Hall system with ail arbitrary unidirectional, threefold staircase potential. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 2-DIMENSIONAL ELECTRON-GAS; NORMAL-METAL RINGS; EDGE STATES; GAAS; MAGNETORESISTANCE; FLUCTUATIONS; WAVES; |
| 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: | 10 Nov 2020 09:57 |
| Last Modified: | 10 Nov 2020 09:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/31475 |
Actions (login required)
 |
View Item |
