Hydrogenic impurity states in zinc-blende InxGa1-xN/GaN in cylindrical quantum well wires

Baser P., Elagoz S., Kartal D., Karki H. D.

SUPERLATTICES AND MICROSTRUCTURES, cilt.49, sa.5, ss.497-503, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 5
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.spmi.2011.02.003
  • Dergi Adı: SUPERLATTICES AND MICROSTRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.497-503
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

Within the framework of effective-mass approximation, the binding energy of a hydrogenic donor impurity in zinc-blende (ZB) InxGa1-xN/GaN cylindrical quantum well wires (CQWWs) is investigated using variational procedures. Numerical results show that the ground-state donor binding energy E-b is highly dependent on the impurity position and the CQWWs structure parameters. The donor binding energy for a shallow donor impurity located at the center of the CQWWs is the largest. As the impurity position changes from the center of the wire to its edge, the donor binding energy gets smaller. Also, we have found that In concentration is a very important value to tailor the system, since the binding energies close to binding energy maxima are strongly dependent on In content. (C) 2011 Elsevier Ltd. All rights reserved.