Photocarrier-induced spin heating and spin-lattice relaxation in diluted magnetic Stranski-Krastanov quantum dots

被引：18

作者：

Hundt, A

Puls, J

Akimov, AV

Fan, YH

Henneberger, F

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.72.033304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using the photoluminescence as a monitor, the Mn spin heating via photoexcited carriers and the spin-lattice relaxation of the magnetic ions in (Cd,Mn)Se quantum dots are studied. Spin dissipation times in the 1 mu s range are observed. Direct heating via spin exchange with the photocarriers plays a minor role. The dependence of the spin-lattice relaxation rate on Mn concentration, temperature, as well as magnetic field indicates that an Orbach process (in a locally heated environment) via Mn pairs is responsible for the dissipation of the magnetic ion spin.

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页数：4

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