Optical spin control in nanocrystalline magnetic nanoswitches

被引：9

作者：

Echeverria-Arrondo, C. ^{[1
,2
,3
]}

Perez-Conde, J. ^{[3
]}

Ayuela, A. ^{[1
,2
]}

机构：

[1] CSIC UPV EHU, Ctr Fis Mat, Fac Quim, Dept Fis Mat,Ctr Fis Mat MPC, E-20018 San Sebastian, Spain

[2] Donostia Int Phys Ctr DIPC, E-20018 San Sebastian, Spain

[3] Univ Publ Navarra, Dept Fis, E-31006 Pamplona, Spain

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 04期

关键词：

cadmium compounds; electron spin polarisation; excitons; ground states; II-VI semiconductors; impurities; magnetic switching; magnetoelectronics; manganese; photoexcitation; semiconductor doping; semiconductor quantum dots; semimagnetic semiconductors; wide band gap semiconductors; SEMICONDUCTOR QUANTUM DOTS; POLARON;

D O I：

10.1063/1.3193545

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the optical properties of (Cd,Mn)Te quantum dots (QDs) by looking at the excitons as a function of the Mn impurities positions and their magnetic alignments. When doped with two Mn impurities, the Mn spins, aligned initially antiparallel in the ground state, have lower energy in the parallel configuration for the optically active spin-up exciton. Hence, the photoexcitation of the QD ground state with antiparallel Mn spins induces one of them to flip and they align parallel. This suggests that (Cd,Mn)Te QDs are suitable for spin-based operations handled by light.

引用

页数：3

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