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@ARTICLE{Schnohr:288084,
author = {Schnohr, Claudia},
title = {{C}ompound semiconductor alloys: {F}rom atomic-scale
structure to bandgap bowing},
journal = {Applied physics reviews},
volume = {2},
number = {3},
issn = {1931-9401},
address = {New York, NY},
publisher = {AIP},
reportid = {PUBDB-2015-04796},
pages = {031304},
year = {2015},
note = {(c) AIP Publishing LLC},
abstract = {Compound semiconductor alloys such as In$_{x}$Ga$_{1-x}$As,
GaAsxP$_{1-x}$, or CuIn$_{x}$Ga$_{1-x}$Se$_{2}$ are
increasingly employed in numerous electronic,
optoelectronic, and photonic devices due to the possibility
of tuning their properties over a wide parameter range
simply by adjusting the alloy composition. Interestingly,
the material properties are also determined by the
atomic-scale structure of the alloys on the subnanometer
scale. These local atomic arrangements exhibit a striking
deviation from the average crystallographic structure
featuring different element-specific bond lengths,
pronounced bond angle relaxation and severe atomic
displacements. The latter, in particular, have a strong
influence on the band gap energy and give rise to a
significant contribution to the experimentally observed band
gap bowing. This article therefore reviews experimental and
theoretical studies of the atomic-scale structure of III-V
and II-VI zincblende alloys and I-III-VI$_{2}$ chalcopyrite
alloys and explains the characteristic findings in terms of
bond length and bond angle relaxation. Different approaches
to describe and predict the band gap bowing are presented
and the correlation with local structural parameters is
discussed in detail. The article further highlights both
similarities and differences between the cubic zincblende
alloys and the more complex chalcopyrite alloys and
demonstrates that similar effects can also be expected for
other tetrahedrally coordinated semiconductors of the
adamantine structural family.},
cin = {DOOR},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {899 - ohne Topic (POF3-899) / FS-Proposal: I-20110135
(I-20110135) / FS-Proposal: I-20100027 (I-20100027)},
pid = {G:(DE-HGF)POF3-899 / G:(DE-H253)I-20110135 /
G:(DE-H253)I-20100027},
experiment = {EXP:(DE-H253)D-C-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000362564300006},
doi = {10.1063/1.4930002},
url = {https://bib-pubdb1.desy.de/record/288084},
}