Binding energies of helium-like impurities in parabolic quantum wells under an applied electric field

Okan S., Akbas H., Aktas S., Tomak M.

SUPERLATTICES AND MICROSTRUCTURES, vol.28, no.3, pp.171-176, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 3
  • Publication Date: 2000
  • Doi Number: 10.1006/spmi.2000.0901
  • Journal Name: SUPERLATTICES AND MICROSTRUCTURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.171-176
  • Keywords: double donors, band nonparabolicity, polarization, DONOR IMPURITY
  • Middle East Technical University Affiliated: Yes

Abstract

We present a variational method to compute the binding energies of helium-like impurities in finite parabolic GaAs-Ga1-xAlxAs quantum wells. The effects of band nonparabolicity in the conduction band are taken into account within the effective mass approximation. The dependence of the impurity binding energy on the applied electric field and the impurity position is also discussed together with the polarization effect for all cases. (C) 2000 Academic Press.