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Browsing by Author "Kunert, HW"

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Clebsch-Gordan coefficients for scattering processes in Si and Ge

Author: Kunert, HW ; Machatine, AGJ ; Niyongabo, P ; Govender, M ; Mwakikunga, Bonex W Date: Oct 2012 Scattering matrix for two phonon processes at k = 0 in Si and Ge of O(sup7)(subh) symmetry is given. Also diagonalization of spin-orbit interaction Hamiltonian has been computed by means of Clebsh-Gordan coefficients. The authors have concluded ... Read more
Electrical and optical properties of mixed phase tungsten trioxide films grown by laser pyrolysis

Author: Govender, M ; Mwakikunga, Bonex W ; Machatine, AGJ ; Kunert, HW Date: Feb 2014 Laser pyrolysis was chosen to synthesize tungsten trioxide starting with tungsten ethoxide precursor. The film was found to have a thickness that varied from 205 nm to 1 µm. X-ray diffraction and Raman spectroscopy confirmed the presence of ... Read more
Optical selection rules and scattering processes in rocksalt wide band gap ZnO

Author: Kunert, HW ; Govender, M ; Machatine, AGJ ; Mwakikunga, Bonex W ; Niyongabo, P Date: Feb 2014 At sufficiently high pressures, wurtzite structure zinc oxide (W-ZnO) can be transformed to the cubic rocksalt (R-ZnO) structure. The R-ZnO exhibits semiconductor behavior with an indirect wide band gap of inline image. The maximum valence ... Read more
Scattering tensors and optical transitions in Si and Ge

Author: Kunert, HW ; Machatine, AGJ ; Niyongabo, P ; Govender, M ; Mwakikunga, Bonex W Date: Aug 2012 The selection rules (SR’s) for the Kronecker product (KP) of Si and Ge irreducible representations (irreps) are required to determine the intervalley scattering processes. The SR’s for transitions between the lowest conduction band minima at ... Read more

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Browsing by Author "Kunert, HW"

Browsing by Author "Kunert, HW"

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