Self polarization in GaAs-(Ga, Al)As quantum well wires: Electric field and geometrical effects

ULAŞ M., ERDOĞAN İ., ÇİÇEK E., DALGIÇ S.

Physica E: Low-Dimensional Systems and Nanostructures, cilt.25, sa.4, ss.515-520, 2005 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Sayı: 4
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.physe.2004.08.100
  • Dergi Adı: Physica E: Low-Dimensional Systems and Nanostructures
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.515-520
  • Anahtar Kelimeler: Electric field, Quantum well wires, Self polarization, Shallow donors
  • Trakya Üniversitesi Adresli: Evet

Özet

The response of an electron to an external electric field in different shapes of infinite quantum well wires has been investigated. The self-polarization effect which can be defined as the influence of the barrier potential on the impurity electron is studied for the quantum well wire of square, rectangular and cylindrical cross-sections. An external electric field vanishes due to the self-polarization effect has been calculated. It is shown that the self-polarization effect outside of the center depends on both the geometrical form of the wire and the impurity position in the same structure. © 2004 Elsevier B.V. All rights reserved.