Binding energy of hydrogenic impurities in a quantum well under the tilted magnetic field

Kasapoglu E., Sari H., Sokmen I.

SOLID STATE COMMUNICATIONS, cilt.125, ss.429-434, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 125
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0038-1098(02)00774-3
  • Dergi Adı: SOLID STATE COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.429-434
  • Anahtar Kelimeler: quantum wells, impurities in semiconductors, ELECTRIC-FIELD, STATES, DONORS, SPECTRA, DENSITY
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

This paper treats theoretically the angle dependence of the ground state binding energy of a shallow donor impurity in semiconductor quantum-well systems on the tilted magnetic field. By making an appropriate coordinate transform we have calculated the ground state binding energy of a shallow donor, impurity at the center of GaAs/Ga1-xAlxAs quantum well in the effective-mass approximations and variationally. We show that the binding energy depends strongly not only on quantum confinement, but also on the direction of the magnetic field. For example; for L-0 = 100 Angstrom, the change of the binding energy between theta = 15 and 45degrees approximately is 2.5R(y) (similar to 13 meV). We expect that this change will be useful in designing the quantum-well structure in which the impurity effects play important role. (C) 2003 Elsevier Science Ltd. All rights reserved.