Simultaneous effects of temperature, hydrostatic pressure and electric field on the self-polarization and electric field polarization in a GaAs/Ga 0.7Al0.3As spherical quantum dot with a donor impurity

ERDOĞAN İ., AKANKAN O., Akbas H.

Superlattices and Microstructures, cilt.59, ss.13-20, 2013 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.spmi.2013.03.020
  • Dergi Adı: Superlattices and Microstructures
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.13-20
  • Anahtar Kelimeler: Electric field, Hydrostatic pressure, Quantum dot, Self-polarization, Temperature
  • Trakya Üniversitesi Adresli: Evet

Özet

Based on the effective mass approximation within a variational approach, we have calculated the temperature effect on the donor binding energy, self-polarization (SP), and electric field polarization (FP) in a GaAs/Ga 0.7Al0.3As spherical quantum dot (SQD) with off center donor impurity under the action of electric field and hydrostatic pressure. The binding energy and polarizations are computed as a function of the temperature, and electric field strength for two different pressures. The results show that the values of the self-polarization are greater than the values of the electric field polarization. There are no reports on comparison of the SP and FP in low-dimensional structures, so far. © 2013 Published by Elsevier Ltd.