Nanosecond Spin Dynamics in (Cd,Mn)Te Quantum Dots and Quantum Wells

Results of studies of the magnetization evolution in a single (Cd,Mn)Te quantum well after a short pulse of magnetic field of a few tens of millitesla is compared with results of analogous studies performed on an ensemble of (Cd,Mn)Te quantum dots. The characteristic time of magnetization relaxation...

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Veröffentlicht in:Journal of the Korean Physical Society 2008, 53(5), , pp.2963-2966
Hauptverfasser: Goryca, Mateusz, Kossacki, Piotr, Nawrocki, Michal, Wojnar, Piotr, Karczewski, Grzegorz
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Sprache:eng
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Zusammenfassung:Results of studies of the magnetization evolution in a single (Cd,Mn)Te quantum well after a short pulse of magnetic field of a few tens of millitesla is compared with results of analogous studies performed on an ensemble of (Cd,Mn)Te quantum dots. The characteristic time of magnetization relaxation in the absence of external magnetic field is of the order of tens of nanoseconds. Upon application of a static magnetic field of the order of 1 T, the relaxation in the quantum well slows down by about three orders of magnitude, while relaxation in quantum dots remains unchanged. One possible explanation of this is a much larger mixing of Mn ion spin states in the quantum dots due to, e.g., local deformation. KCI Citation Count: 1
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.53.2963