Magneto-photoluminescence study at a fractional quantum Hall regime of charged excitons in a dilute magnetic semiconductor

Y. Hirayama, K. Oto, H. Mino, K. Uchida, S. Takeyama, G. Karczewski, T. Wojtowicz, J. Kossut

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We have performed magneto-photoluminescence measurements on modulation doped n-type Cd1-xMnxTe/Cd1-yMgyTe single quantum wells. In low magnetic fields (the electrons filling factor ν > 1), we observed several photoluminescence lines associated with spin-singlet and spin-triplet charged excitons. In high magnetic fields (ν < 1), we observed only one of the spin-triplet charged excitons that are called as a bright type due to characteristic spin states of electrons and holes in dilute magnetic semiconductor quantum wells, where the photoluminescence intensity increased at a fractional value of ν(= 2/3). We consider that the screening effect plays a crucial role for this behavior in high magnetic fields.

Original languageEnglish
Pages (from-to)3821-3824
Number of pages4
JournalInternational Journal of Modern Physics B
Volume18
Issue number27-29
DOIs
Publication statusPublished - 2004 Nov 30
Externally publishedYes

Keywords

  • Charged exciton
  • Fractional quantum hall state
  • Photoluminescence

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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