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Optical properties of a magneto-donor in a quantum dot |
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| Authors: | A. Didi Seddik I. Zorkani |
| Affiliation: | aDepartment of Theoretical Physics, University of Szeged, Aradi vtk. tere 1, H-6720 Szeged, Hungary;bInstitute of Physics, University of West Hungary, Bajcsy Zs. út 5-7, H-9400 Sopron, Hungary;cDepartement Fysica, Universiteit Antwerpen (Campus Drie Eiken), Universiteitsplein 1, B-2610 Antwerpen, Belgium |
| Abstract: | The temperature-dependent magnetoresistance effect is investigated in a magnetically modulated two-dimensional (2D) electron gas (2DEG) which can be realized by depositing two parallel ferromagnets on top of a 2DEG electron gas. In the resonant tunnelling regime the transmission for the parallel and antiparallel magnetization configurations shows a quite distinct dependence on the longitudinal wave vector of the incident electrons. This leads to a very large magneto resistance ratio with a strong temperature dependence. |
| Keywords: | Giant magnetoresistance Resonant tunnelling Magnetic barriers |
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