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Magneto-optical spectroscopy of positively charged excitons in GaAs quantum wells

A.J. Shields, J.L. Osborne, M.Y. Simmons, M. Pepper, and D.A. Ritchie
Phys. Rev. B 52, R5523(R) – Published 15 August 1995
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Abstract

We report observation of positively charged excitons (X+) in GaAs quantum wells remotely doped with acceptors. Upon reducing the excess hole density, by photoexciting carriers in the doped barrier layer, we observe the neutral excitonic transition strengthen relative to X+. Further confirmation of the X+ assignment is provided by its temperature and magnetic-field dependence. We observe both the antisymmetric (singlet) and symmetric (triplet) X+ spin states.

  • Received 19 May 1995

DOI:https://doi.org/10.1103/PhysRevB.52.R5523

©1995 American Physical Society

Authors & Affiliations

A.J. Shields

  • Toshiba Cambridge Research Centre, 260, Science Park, Milton Road, Cambridge CB4 4WE, United Kingdom

J.L. Osborne, M.Y. Simmons, M. Pepper, and D.A. Ritchie

  • Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom

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Issue

Vol. 52, Iss. 8 — 15 August 1995

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