Optical selection rules and scattering processes in rocksalt wide band gapZnO
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Date
Authors
Kunert, Herbert W.
Govender, Malcolm
Machatine, Augusto Gonçalo Jose
Mwakikunga, B.W.
Niyongabo, Prime
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley-Blackwell
Abstract
At sufficiently high pressures, wurtzite structure zinc oxide (WZnO)
can be transformed to the cubic rocksalt (R-ZnO)
structure. The R-ZnO exhibits semiconductor behavior with an
indirect wide band gap of Eg ¼ 5:5 eV. The maximum valence
band is found far away from the center of the Brillouin zone
(BZ) at high symmetry point L and line S, depending on the
pressure. The unusual electronic band structure (EBS) of the RZnO
leads to several direct and indirect optical transitions
which find applications in ultraviolet optoelectronic devices.
We have investigated radiative and non-radiative symmetry
restricted selection rules, as well as inter- and intra-valley
scattering processes.
Description
Keywords
Excitons, Group theory, Scattering processes, Zinc oxide
Sustainable Development Goals
Citation
Kunert, HW, Govender, M, Machatine, AGJ, Mwakikunga, BW & Niyongabo, P 2014, 'Optical selection rules and scattering processes in rocksalt wide band gapZnO', Physica Status Solidi. A, Applications and Materials Science, vol. 211, no. 2, pp. 435-439.