Bockhorn, Lina and Schuh, Dieter and Reichl, Corinna and Wegscheider, Werner and Haug, R. J. (2024) Influence of the electron density on the giant negative magnetoresistance in two-dimensional electron gases. PHYSICAL REVIEW B, 109 (20): 205416. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
In situ variation of the electron density via a metallic gate can control the disorder potentials in twodimensional electron gases (2DEGs). This also influences the negative magnetoresistance at low magnetic fields, which is commonly observed in ultrahigh mobility 2DEGs. We investigate the temperature -dependent giant negative magnetoresistance (GNMR) as a function of the electron density for several temperatures and currents. Thereby, we find that the GNMR behavior depends decisively on the electron density. This observation is attributed to a changed disorder potential with electron density. In the case of higher electron densities, a nonlinear current dependency of the GNMR is observed, which could be described within the hydrodynamic regime.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Oct 2025 08:18 |
| Last Modified: | 14 Oct 2025 08:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64619 |
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