Browsing by Author "Wang, Wan-Tsang"

Now showing 1 - 2 of 2

Application of Block Diagonal Technique to a Hamiltonian Matrix in Performing Spin-splitting Calculations for GaN Wurtzite Materials
(2012-02-01)
Chen, Chun-Nan
;
Chang, Sheng-Hsiung
;
Su, Wei-Long
;
Wang, Wan-Tsang
;
Kao, Hsiu-Fen
The bulk inversion asymmetry (Dresselhaus) terms (i.e., B-2, B-1, and B'(1) terms) of wurtzite materials are determined. The 2 x 2 conduction band, 2 x 2 heavy-hole band, 2 x 2 light-hole band, and 2 x 2 crystal-field split-off hole band matrices of wurtzite semiconductors are developed and decoupled by using a block diagonal technique. Importantly, those 2 x 2 block diagonal matrices incorporate not only the interband coupling effect but also the bulk inversion asymmetry effect. Analytical expressions for the conduction and the valence band spin-splitting parameters and energies of GaN wurtzite materials are formulated by solving the block diagonal matrices. The presence of these terms is shown to include the spin-splitting phenomenon.
k.p WURTZITE HAMILTONIAN AND OPTICAL MATRIX WITH BULK INVERSION ASYMMETRY
(2012-01-10)
Chen, Chun-Nan
;
Su, Wei-Long
;
Wang, Wan-Tsang
;
Jen, Jen-Yi
;
Li, Yiming
A k.p wurtzite Hamiltonian including the bulk (or intracell) inversion asymmetry is developed. Meanwhile, a k.p wurtzite optical matrix including this intracell asymmetry is also established.