Picosecond dynamics of the photoinduced spin polarization in epitaxial (Ga,Mn)as films.
作者信息
Kimel A V, Astakhov G V, Schott G M, Kirilyuk A, Yakovlev D R, Karczewski G, Ossau W, Schmidt G, Molenkamp L W, Rasing Th
机构信息
NSRIM Institute, University of Nijmegen, 6525 ED Nijmegen, The Netherlands.
出版信息
Phys Rev Lett. 2004 Jun 11;92(23):237203. doi: 10.1103/PhysRevLett.92.237203. Epub 2004 Jun 10.
Abstract
Static and time-resolved magneto-optical spectra of the ferromagnetic semiconductor (Ga,Mn)As show that a pulsed photoexcitation with a fluence of 10 microJ/cm(2) is equivalent to the application of an external magnetic field of about 1 mT, which relaxes with a decay time of 30 ps. This relaxation is attributed to the spin relaxation of electrons in the conduction band and is found to be not affected by interactions with Mn ions.
摘要
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