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

M. Gunes, E. Kasapoglu (), H. Sari, K. Akgungor and I. Sökmen
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M. Gunes: Department of Physics, Cumhuriyet University, 58140 Sivas, Turkey
E. Kasapoglu: Department of Physics, Cumhuriyet University, 58140 Sivas, Turkey
H. Sari: Department of Physics, Cumhuriyet University, 58140 Sivas, Turkey
K. Akgungor: Department of Physics, Dokuz Eylül University, 35160 İzmir, Turkey
I. Sökmen: Department of Physics, Dokuz Eylül University, 35160 İzmir, Turkey

Surface Review and Letters (SRL), 2009, vol. 16, issue 05, 689-696

Abstract: Valence band structure with spin–orbit (SO) coupling ofGaAs/Ga1-xAlxAssquare 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 ($\vec {k}\cdot \vec {p}$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.

Keywords: Finite element method; valence sub-band structure; multiband effective mass theory; 71.15.-m; 71.70.Ej (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09013177

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