Electric field effect on the binding energy of A non-hydrogenic donor impurity in a square quantum well wire

DALGIÇ S., ULAŞ M., ÖZKAPI B.

Journal of Optoelectronics and Advanced Materials, cilt.7, sa.4, ss.2041-2046, 2005 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Özet
  • Cilt numarası: 7 Sayı: 4
  • Basım Tarihi: 2005
  • Dergi Adı: Journal of Optoelectronics and Advanced Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2041-2046
  • Anahtar Kelimeler: Electrical field, Shallow donors, Square quantum well wires
  • Trakya Üniversitesi Adresli: Evet

Özet

We have used a variational technique to calculate the effect of an electric field on the non-hydrogenic binding energy of a donor impurity in a square GaAs/Ga1-xAlxAs quantum well wire (QWW). The non-hydrogenic binding energy of the donor impurity was calculated by the variational method as a function of applied electric field, the wire radius and donor impurity position. The results show that the non-hydrogenic binding energy of donar impurity located around the centre is larger than that of the hydrogenic binding energy. In this work, the variational method employed is capable of giving all the correct trends for impurity binding energies as a function of applied electric field, impurity position and screening effect.