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Excitonic recombination processes in spin-polarized two-dimensional electron gases

J. L. Osborne, A. J. Shields, M. Y. Simmons, N. R. Cooper, D. A. Ritchie, and M. Pepper
Phys. Rev. B 58, R4227(R) – Published 15 August 1998
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Abstract

We report the observation of Coulomb interaction effects on the photoluminescence (PL) spectra of two-dimensional electron systems close to the ν=1 quantum Hall state. Systematic measurements of the polarized PL spectrum as a function of the separation between the two-dimensional electron gas (2DEG) and the photoexcited valence-band hole allow us to identify the recombination mechanisms. These studies demonstrate the formation of bound states between the photoexcited valence-band hole and the ν=1 2DEG. Usually the exciton comprises a single electron in the upper spin level bound to the hole, but the PL line shape suggests that for large separations a Skyrmion-hole excitation forms the ground state.

  • Received 29 May 1998

DOI:https://doi.org/10.1103/PhysRevB.58.R4227

©1998 American Physical Society

Authors & Affiliations

J. L. Osborne

  • Toshiba Cambridge Research Centre, 260, Science Park, Milton Road, Cambridge CB4 4WE, United Kingdom
  • Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom

A. J. Shields

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

M. Y. Simmons

  • Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom

N. R. Cooper

  • Institut Laue-Langevin, Avenue des Martyrs, Boîte Postale 156, 38042 Grenoble, France

D. A. Ritchie

  • Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom

M. Pepper

  • Toshiba Cambridge Research Centre, 260, Science Park, Milton Road, Cambridge CB4 4WE, United Kingdom
  • Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom

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Issue

Vol. 58, Iss. 8 — 15 August 1998

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