Charged excitons and biexcitons in CdZnTe/(Cd,Zn,Mn)Te quantum wells in pulse magnetic fields

Shojiro Takeyama, Yoshiaki Natori, Yasuhiro Hirayama, Eiji Kojima, Yu Arishima, Hirofumi Mino, Grzegosz Karczewski, Tomasz Wojtowicz, Jacek Kossut

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have studied exciton complexes such as charged excitons and biexcitons in dilute magnetic semiconductor Cd1-xZnxTe/Cd 1-x-yZnxMnyTe (x = 0.07, y = 0.43) quantum wells (well widths 4 and 9 nm). Laser excitation power dependence and time-resolved photoluminescence (PL) showed unique features related to excitons, charged excitons, and biexcitons. Four-wave-mixing spectroscopy with different choices of polarized incident light exhibited beating signals arising from exciton-biexciton interaction. Circular polarized PL was measured in magnetic fields of up to 42 T using a pulse magnet. The observed Zeeman splitting and the degree of circular polarization in magnetic fields revealed that the formation of biexcitons is quenched upon applying a magnetic field, and PL from the charged excitons was preserved up to the highest magnetic field.

Original languageEnglish
Article number044702
Journaljournal of the physical society of japan
Volume77
Issue number4
DOIs
Publication statusPublished - 2008 Apr 1
Externally publishedYes

Keywords

  • Biexciton
  • Charged exciton
  • Dilute magnetic semiconductor
  • Exciton
  • Four-wave mixing
  • Photoluminescence
  • Pulse magnetic field
  • Quantum well
  • Transient spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Takeyama, S., Natori, Y., Hirayama, Y., Kojima, E., Arishima, Y., Mino, H., Karczewski, G., Wojtowicz, T., & Kossut, J. (2008). Charged excitons and biexcitons in CdZnTe/(Cd,Zn,Mn)Te quantum wells in pulse magnetic fields. journal of the physical society of japan, 77(4), [044702]. https://doi.org/10.1143/JPSJ.77.044702