Valence Band Structure of Wurtzite Type Crystals

Abstract

The valence band structure of wurtzite type materials is investigated using a k . p approximation. The E(k) dependence for the bands A, B, and C is completely determined by six parameters: two for k I I c, three for k I I c and one additional parameter for a general direction. Relationships between the effective masses a t k = 0 are given for the three bands. Even near k = 0 the sub-bands are strongly non-parabolic. The constant-energy surfaces retain their rotational symmetry. Numerically calculated E( k) curves are pre-

Excited states of bound excitons in wurtzite‐type semiconductors

“…Considering additionally the hole spin jh = f3/2, they are fourfold degenerate and similar to atomic energy levels a splitting is expected by some kind of spin-orbit interaction. The analogue of the atoniic spin-orbit interaction for holes in wurtzitetype crystals is the so-called A-B coupling [17]. As shown in a following paper [18] it splits indeed the levels 10, l k l ) and 10, Z k l ) in doublets.…”

On correlation of CdS and CdSe valence band parameters

“…where m 8 A,B,C and m t A,B,C are effective mass components for the holes of three valence subbands A, B, and C, either transversal (8) or parallel (t) to high-symmetry hexagonal C-axis of the crystal, and…”

“…The most fundamental papers considering the definition of hole effective masses for CdS and CdSe are the papers of Cardona [3], Mahan and Hopfield [5], and Gutsche and Jahne [6][7][8]. The detailed analysis of their …”

“…To obtain realistic calculation data, one needs to know the whole set of parameters describing materials used for each component of the device. Both CdS and CdSe have extensive experimental and theoretically predicted data published, including information on secondary energy gaps separating conduction band extremes in the center of Brillouin zone and the components of effective mass tensor (e.g., [3][4][5][6][7][8]). However, these effective mass data are in significant disagreement regarding the values published in different sources.…”

Band parameters of CdS and CdSe single crystals determined from optical exciton spectra

“…Baldereschi and Lipari [18] calculated corrections due to the complex band structure using the k -p parameters given by Jahne and Gutsche [19] where e-h exchange effects are not taken into account. They found first-and second-order corrections.…”