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Dynamics of localized Mn spins in diluted‐magnetic‐semiconductor nanostructures with quantum dots
Author(s) -
Scherbakov A. V.,
Akimov A. V.,
Yakovlev D. R.,
Ossau W.,
Molenkamp L. W.,
Terai Y.,
Kuroda S.,
Takita K.,
Souma I.,
Oka Y.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301916
Subject(s) - wetting layer , quantum dot , condensed matter physics , spins , magnetic semiconductor , relaxation (psychology) , spin (aerodynamics) , chemistry , materials science , physics , nanotechnology , ferromagnetism , psychology , social psychology , thermodynamics
Dynamics of spin–lattice relaxation of the magnetic Mn‐ion system is investigated for nanostructures with (Cd,Mn)Te and (Cd,Mn)Se diluted‐magnetic‐semiconductor (DMS) quantum dots. A nonequilibrium phonon technique with optical detection of the induced heating of the magnetic ion system was exploited. A strongly nonexponential decay of the spin dynamics is found to be specific for the DMS quantum dots. It is explained in the frame of a model suggesting that the spin dynamics in quantum dots is strongly affected by a spin diffusion into/from a DMS wetting layer, where the spin–lattice relaxation rate differs from that in the quantum dots. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)