https://doi.org/10.15407/spqeo6.02.115
Semiconductor Physics, Quantum Electronics & Optoelectronics. 2003. V. 6, N 2. P. 115-120.
PACS: 71.15.Hx, 71.20.Nr, 71.22.+i
Chemical bonding and optical
bowing in III-nitrides solid solutions
O.V. Voznyy, V.G. Deibuk
Chernivtsi national university, 2 Kotsyubinskiy
Str., 58012 Chernivtsi, Ukraine
E-mail: voznyy@elegance.cv.ua , vdei@chnu.cv.ua
Abstract. Chemical
bonding and electronic properties of III-nitrides solid solutions are
studied using a model empirical pseudopotential method in modified virtual
crystal approximation taking into account positional and compositional
disorder. The changes in chemical bonding are analyzed in different ionicity
models. The bowing is mainly caused by compositional disorder, volume
deformation effects and valence charge redistribution in the alloys. The
connection between the value of the bowing and basic parameters of the
materials is found.
Keywords: III-nitrides, chemical bonding, ionicity, bowing, empirical pseudopotential,
disordered alloys.
Paper received 21.03.03; accepted for publication
16.06.03.
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