Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 205416 |
| Fachzeitschrift | Physical Review B |
| Jahrgang | 109 |
| Ausgabenummer | 20 |
| Publikationsstatus | Veröffentlicht - 13 Mai 2024 |
Abstract
In situ variation of the electron density via a metallic gate can control the disorder potentials in two-dimensional 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.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: Physical Review B, Jahrgang 109, Nr. 20, 205416, 13.05.2024.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Influence of the electron density on the giant negative magnetoresistance in two-dimensional electron gases
AU - Bockhorn, L.
AU - Schuh, D.
AU - Reichl, C.
AU - Wegscheider, W.
AU - Haug, R. J.
N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society.
PY - 2024/5/13
Y1 - 2024/5/13
N2 - In situ variation of the electron density via a metallic gate can control the disorder potentials in two-dimensional 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.
AB - In situ variation of the electron density via a metallic gate can control the disorder potentials in two-dimensional 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.
UR - http://www.scopus.com/inward/record.url?scp=85193037751&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.109.205416
DO - 10.1103/PhysRevB.109.205416
M3 - Article
AN - SCOPUS:85193037751
VL - 109
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 20
M1 - 205416
ER -