| Zugriffsnummer | 11255 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Ferromagnetism in partially spin-polarized GaInAs quantum wells [poster] |
| Autor(in); Institution |
Vogt, Felix; TU Braunschweig, Institut für Technische Physik, Braunschweig, GERMANY; TU Braunschweig, Hochmagnetfeldanlage, Braunschweig, GERMANY
Nachtwei, Georg; TU Braunschweig, Institut für Technische Physik, Braunschweig, GERMANY
Hein, Günter; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Künzel, Harald; Heinrich-Hertz-Institut für Nachrichtentechnik GmbH, Berlin, GERMANY
|
| Quelle/Jahr | Physics of semiconductors : 27th International Conference on the Physics of Semiconductors, ICPS-27, Flagstaff, Arizona, 26 - 30 July 2004. Part B:(2005), 1419 - 1420 |
| Schriftenreihe | AIP conference proceedings: 772,B |
| Herausgeber(in) |
Menéndez, José
|
| ISBN | 0-7354-0257-4 |
| Verlag | Melville, NY: American Inst. of Physics |
| Konferenzangaben | 27th International Conference on the Physics of Semiconductors, ICPS, Flagstaff, Arizona, 26-30, July, 2004, USA |
| Zusammenfassung | We performed measurements of the Shubnikov-de Haas effect (SdH) and of the Quantum-Hall effect (QHE) at GaInAs quantum wells confined by AlInAs barriers. At odd filling factors (1 and 3), the two-dimensional electron system (2DES) of the quantum well is partially spin-polarized, leading to an enhanced effective Landé factor g. In this case, asymmetric and hysteretic SdH-oscillations were predicted [1]. At filling factor 1 (higher spin polarization) the asymmetry could be confirmed experimentally. At filling factor 3, the predicted asymmetry could be observed at a sample of higher electron density in tilted magnetic fields above 12 T. A hysteresis was not resolvable due to a reduced spin polarization. [1]G. Nachtwei et al., Appl. Phys. Letters 82, 2068 (2003) |
