FINITE ELEMENT ANALYSIS OF VALENCE BAND STRUCTURE OF SQUARE QUANTUM WELL UNDER THE ELECTRIC FIELD

Gunes M., Kasapoglu E., Sari H., AKGÜNGÖR K., Sokmen I.

SURFACE REVIEW AND LETTERS, vol.16, no.5, pp.689-696, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 5
  • Publication Date: 2009
  • Doi Number: 10.1142/s0218625x09013177
  • Journal Name: SURFACE REVIEW AND LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.689-696
  • Keywords: Finite element method, valence sub-band structure, multiband effective mass theory, OPTICAL-PROPERTIES
  • Dokuz Eylül University Affiliated: Yes

Abstract

Valence band structure with spin-orbit (SO) coupling of GaAs/Ga1-xAlxAs square quantum well (SQW) under the electric field by a calculation procedure based on a finite element method (FEM) is investigated using the multiband effective mass theory ((k) over right arrow . (p) over right arrow method). The validity of the method is confirmed with the results of D. Ahn, S. L. Chuang and Y. C. Chang (J. Appl. Phys. 64 (1998) 4056), who calculated valence band structure, using axial approximation for Luttinger-Kohn Hamiltonian and finite difference method. Our results demonstrated that SO coupling and electric field have significant effects on the valence band structure.