Magneto-optical study of n -type modulation-doped ZnO/ Mgx Zn1-x O single quantum well structures

T. Makino, Y. Furuta, Y. Segawa, A. Tsukazaki, A. Ohtomo, Y. Hirayama, R. Shen, S. Takeyama, Y. Takagi, M. Kawasaki

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report on the effect of electron injection on the magneto-optical properties of MgZnO/ZnO(5 nm)/MgZnO single quantum wells (SQWs) by embedding a Ga delta-doped layer in one of the MgZnO barriers. Approaching the delta-doped layer to the SQW resulted in a photoluminescence (PL) blueshift due to the screening of internal polarization field by the injected electrons. Circular polarization in PL was enhanced by a magnetic field up to 50 T with a Faraday configuration. The observed Zeeman splitting and the degree of circular polarization in the magnetic field revealed that the PL originates from the negatively charged excitons X-.

Original languageEnglish
Article number155333
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number15
DOIs
Publication statusPublished - 2009 Oct 30

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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