Effect of the electron Coulomb potential on hole confinement in II-VI quantum wells

A. V. Kavokin, V. P. Kochereshko, G. R. Posina, I. N. Uraltsev, D. R. Yakovlev, G. Landwehr, R. N. Bicknell-Tassius, and A. Waag
Phys. Rev. B 46, 9788 – Published 15 October 1992
PDFExport Citation

Abstract

We report a pronounced effect of an additional hole confinement in the electron Coulomb potential on giant splitting and oscillator strength of the exciton Zeeman patterns in CdTe/Cd0.75Mn0.25Te quantum-well structures. Measuring oscillator strength and Zeeman splitting as a function of the quantum-well width and/or an external magnetic field by resonance reflection spectroscopy we demonstrate the transition from a hole subject to a net potential well to that confined to the electron Coulomb potential occurring in quantum wells thicker than 30 Å. This transition is also found in superlattices where the electron wave function changes its character from three to two dimensional with an increase of the superlattice period. Analyzing the magneto-optical data taken above and below the transition, we conclude that an additional hole confinement reduces a hole wave-function penetration into semimagnetic barriers and decreases the strength of the exchange interaction of holes with magnetic ions.

  • Received 28 April 1992

DOI:https://doi.org/10.1103/PhysRevB.46.9788

©1992 American Physical Society

Authors & Affiliations

A. V. Kavokin, V. P. Kochereshko, G. R. Posina, and I. N. Uraltsev

  • A. F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia

D. R. Yakovlev, G. Landwehr, R. N. Bicknell-Tassius, and A. Waag

  • Physikalisches Institut der Universität Würzburg, 8700 Würzburg, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 46, Iss. 15 — 15 October 1992

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×