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

Authors :: Ismail Sokmen
M. Gunes
Hüseyin Sari
K. Akgüngör
E. Kasapoglu
[Gunes, M. -- Kasapoglu, E. -- Sari, H.] Cumhuriyet Univ, Dept Phys, TR-58140 Sivas, Turkey -- [Akgungor, K. -- Sokmen, I.] Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey
akgungor, kadir -- 0000-0003-1071-4405
Source :: Surface Review and Letters. 16(05):689-696
Publication Year :: 2009
Abstract: WOS: 000271864200007<br />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.<br />T. R. Prime Ministry State Planning Organization [DPT-120220]<br />The authors would like to thank the T. R. Prime Ministry State Planning Organization for financial support (project No. DPT-120220).

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