| Zugriffsnummer | 46735 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Relevance of weak and strong classical scattering for the giant negative magnetoresistance in two-dimensional electron gases |
| Autor(in); Institution |
Horn-Cosfeld, B.; Heinrich-Heine-Universität, Düsseldorf, Institut für Experimentelle Physik der kondensierten Materie, Düsseldorf, GERMANY
Schluck, J.; Heinrich-Heine-Universität, Düsseldorf, Institut für Experimentelle Physik der kondensierten Materie, Düsseldorf, GERMANY
Lammert, J.; Heinrich-Heine-Universität, Düsseldorf, Institut für Experimentelle Physik der kondensierten Materie, Düsseldorf, GERMANY
Cerchez, M.; Heinrich-Heine-Universität, Düsseldorf, Institut für Experimentelle Physik der kondensierten Materie, Düsseldorf, GERMANY
Heinzel, T.; Heinrich-Heine-Universität, Düsseldorf, Institut für Experimentelle Physik der kondensierten Materie, Düsseldorf, GERMANY
Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Schumacher, Hans Werner; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Mailly, D.; CNRS-C2N, Université Paris-Saclay, Marcoussis, FRANCE
|
| Quelle/Jahr | Physical Review B: 104 (2021), 4, 1 - 9 |
| Artikelnummer | 045306 |
| ISSN | 2469-9950 (PRINT) ; 2469-9969 (ONLINE) |
| DOI | |
| Verlag | Ridge, NY: American Physical Society (APS) |
| Freie Schlagworte | two-dimensional electron gas ; 2DEG ; giant negative magnetoresistance |
| Zusammenfassung | The giant negative magnetoresistance (GNMR), observed in two-dimensional electron gases of high mobility, is studied by controlled definition of additional short-range scatterers in form of two-dimensional Lorentz arrays of varying obstacle density, as well as in the presence of edge scattering. The results support models, which ascribe the temperature-independent regime of the GNMR to strong, classical scattering and the temperature- dependent regime to electron-electron interactions under the influence of mixed disorder. The threshold magnetic field, which separates the two regimes, is in rough agreement with the lower percolation transition of the Lorentz array. At large obstacle densities, interaction corrections are suppressed and memory effects become more relevant. Shape, amplitude, and width of the GNMR depend sensitively on the time scales of the contributing scattering mechanisms. This can lead to qualitatively similar shapes for quite different parameter values. |
| Themenbereich der Metrologie | Elektrizität und Magnetismus |
Zitierung
Horn-Cosfeld, B., Schluck, J., Lammert, J., Cerchez, M., Heinzel, T., Pierz, K., Schumacher, H. W., & Mailly, D. (2021). Relevance of weak and strong classical scattering for the giant negative magnetoresistance in two-dimensional electron gases. Physical Review B, 104(4), 1–9. https://doi.org/10.1103/physrevb.104.045306