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Characteristic splittings and shifts due to the crystal-field splitting and the spin-orbit interaction for (a) AlN, (b) GaN, and (c) InN. The absolute energy values (in meV) are given in parentheses. The threefold degenerate level of the zb polymorphs is used as energy zero.
Computed lattice parameters for zb and wz polytypes. In parentheses are the experimental values (Refs. 18–20).
Valence-band splittings (in meV) for zb and wz polytypes including QP effects. The index “0” indicates a valence-band splitting in absence of the other mechanism, i.e., for and for . The values and have been calculated using the quasicubic approximation . In addition, and have been calculated assuming .
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