Exciton spin injection in CdTe/Cd1-xMnxTe double quantum wells

K. Kayanuma, M. C. Debnath, I. Souma, Z. Chen, A. Murayama, M. Kobayashi, Hiroshi Miyazaki, Y. Oka

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Spin injection processes of excitons were studied by time-resolved photoluminescence in double quantum wells consisting of Cd0.95Mn0.05Te and CdTe layers. Selective excitation of the magnetic and non-magnetic wells confirms the dominant spin injection process from the magnetic well to the non-magnetic, well. The exciton spin injection from the magnetic quantum well of Cd0.95Mn0.05Te arises with an injection time of 10 ps and induces a transient spin polarization with the degree of 0.20 in the non-magnetic well of CdTe. The exciton spin relaxation time in the CdTe well was found to be sufficiently longer than the exciton lifetime of 38 ps.

Original languageEnglish
Pages (from-to)761-764
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume229
Issue number2
DOIs
Publication statusPublished - 2002 Aug 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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