Hydrogenic impurities in graded GaAs-(Ga,Al)As quantum-well wires in an electric field

Kasapoglu E., Sari H., Sokmen I.

PHYSICA B-CONDENSED MATTER, vol.315, no.4, pp.261-266, 2002 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 315 Issue: 4
  • Publication Date: 2002
  • Doi Number: 10.1016/s0921-4526(02)00469-6
  • Journal Name: PHYSICA B-CONDENSED MATTER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.261-266
  • Keywords: shallow donors, quantum-well wires, electric field, polarizability, graded well
  • Dokuz Eylül University Affiliated: No

Abstract

The electric field dependence of polarizability and binding energy of shallow-donor impurities in graded quantum-well wires is calculated by a variational method and in the effective-mass approximation. We have considered a finite confinement model and the results are compared with that of infinite confinement potential. Our calculations have revealed the dependence of the impurity binding and polarizability on the field direction in the graded quantum-well wire. (C) 2002 Elsevier Science B.V. All rights reserved.