Piazza, V and Pellegrini, V and Beltram, F and Wegscheider, W and Bichler, M and Jungwirth, T and MacDonald, AH (2000) Hysteresis and first-order phase transition in the two-dimensional electron gas. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 6 (1-4). pp. 108-111. ISSN 1386-9477, 1873-1759
Full text not available from this repository. (Request a copy)Abstract
We report experimental evidence of the first-order phase transitions in the two-dimensional electron gas formed in a gated wide GaAs/AlGaAs quantum well at even-integer quantum-Hall states, At the filling factor values of v = 2, 4 and low temperatures, crossing of Landau levels through the application of the gate bias yields a suppression of the quantum-Wall-state excitation gap and hysteretical behaviour of the diagonal resistivity in up and down sweeps of the magnetic field. Detailed many-body calculations indicate the occurrence of a first-order phase transition and allow the determination of the exact properties of the electron ground states involved in the transition. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DOUBLE-LAYERS; QUANTUM; INSTABILITY; INTEGER; COLLAPSE; SYSTEM; quantum Hall effect; ferromagnetism; hysteresis |
| 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 May 2021 06:25 |
| Last Modified: | 21 May 2021 06:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42877 |
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