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Browsing by UP Author "Igumbor, Emmanuel"
Now showing items 1-19 of 19
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Igumbor, Emmanuel; Mapasha, Refilwe Edwin; Meyer, Walter Ernst (Springer, 2017-07)The results of an ab initio modelling of aluminium substitutional impurity (AlGe), aluminium interstitial in Ge [IAl for the tetrahedral (T) and hexagonal (H) configurations] and aluminium interstitial-substitutional ...
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Igumbor, Emmanuel; Omotoso, Ezekiel; Meyer, Walter Ernst (Trans Tech Publications, 2017-06)We present results of defect formation energies and charge state thermodynamic transition levels of Mg and Te interstitials in MgTe wurzite structure. We use the generalized gradient approximation and local density ...
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Igumbor, Emmanuel; Ouma, C.N.M.; Webb, Geoffrey; Meyer, Walter Ernst (Elsevier, 2016-01)In this work, we present ab-initio calculation results of Ge di-interstitials (I2(Ge)) in the framework of the density functional theory (DFT) using the Heyd, Scuseria, and Ernzerhof (HSE) hybrid functional. The formation ...
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Igumbor, Emmanuel; Obodo, Kingsley Onyebuchi; Meyer, Walter Ernst (Trans Tech Publications, 2016)We present detailed calculations of formation and thermodynamics transition state energies of Mgi and Sei interstitial defects in MgSe using generalized gradient approximation (GGA) and local density approximation (LDA) ...
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Olaniyan, Okikiola; Igumbor, Emmanuel; Khaleed, Abubakar A.; Mirghni, Abdulmajid Abdallah; Manyala, Ncholu I. (American Institute of Physics, 2019)Graphene is a carbon material with excellent properties, which makes it applicable in a myriad of applications. However, the range of the applications of graphene can be extended to the developing field of nanoelectronics ...
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Gora, Valentine Elifas; Auret, Francois Danie; Danga, Helga Tariro; Tunhuma, Shandirai Malven; Nyamhere, Cloud; Igumbor, Emmanuel; Chawanda, Albert (Elsevier, 2019-08)Please read abstract in the article.
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Igumbor, Emmanuel; Danga, Helga Tariro; Omotoso, Ezekiel; Meyer, Walter Ernst (Elsevier, 2019-03)Please read abstract in the article.
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Igumbor, Emmanuel; Mapasha, Refilwe Edwin; Meyer, Walter Ernst (Elsevier, 2018-04)Please read abstract in the article.
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Omotoso, Ezekiel; Meyer, Walter Ernst; Janse van Rensburg, Pieter Johan; Igumbor, Emmanuel; Tunhuma, Shandirai Malven; Ngoepe, Phuti Ngako Mahloka; Danga, Helga Tariro; Auret, Francois Danie (Elsevier, 2017-10)Please read abstract in the article.
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Tunhuma, Shandirai Malven; Auret, Francois Danie; Nel, Jacqueline Margot; Omotoso, Ezekiel; Danga, Helga Tariro; Igumbor, Emmanuel; Diale, M. (Mmantsae Moche) (Elsevier, 2017-10)We have used deep level transient spectroscopy (DLTS) and Laplace DLTS (L-DLTS) to characterize the electrically active point defects introduced in n-type gallium arsenide by electron beam exposure prior to Schottky ...
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Danga, Helga Tariro; Auret, Francois Danie; Tunhuma, Shandirai Malven; Omotoso, Ezekiel; Igumbor, Emmanuel; Meyer, Walter Ernst (American Institute of Physics, 2019-06-03)In this paper, we report on defects introduced in epitaxially grown n-type silicon (Si) during electron beam exposure. The defects observed were electrically characterized using deep-level transient spectroscopy (DLTS) ...
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Electrically active induced energy levels and metastability of B and N vacancy-complexes in 4H-SiC Igumbor, Emmanuel; Olaniyan, Okikiola; Mapasha, Refilwe Edwin; Danga, Helga Tariro; Omotoso, Ezekiel; Meyer, Walter Ernst (IOP Publishing, 2018-04)Please read abstract in the article.
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Mapasha, Refilwe Edwin; Igumbor, Emmanuel; Andriambelaza, Noeliarinala Felana; Chetty, Nithaya (Elsevier, 2018-04)Please read abstract in the article.
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Igumbor, Emmanuel; Mapasha, Refilwe Edwin; Andrew, Richard Charles; Meyer, Walter Ernst (Elsevier, 2016-09)By means of density functional theory (DFT), using the screened Heyd, Scuseria, and Ernzerhof (HSE06) hybrid functional we present results of the Tm3+Ge-VGe defect complexes in germanium (Ge). The formation energies of ...
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Igumbor, Emmanuel; Meyer, Walter Ernst (Elsevier, 2016-03)Please read abstract in the article.
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Igumbor, Emmanuel; Olaniyan, Okikiola; Mapasha, Refilwe Edwin; Danga, Helga Tariro; Omotoso, Ezekiel; Meyer, Walter Ernst (Elsevier, 2019-01)Please read abstract in the article.
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Igumbor, Emmanuel; Omotoso, Ezekiel; Danga, Helga Tariro; Tunhuma, Shandirai Malven; Meyer, Walter Ernst (Elsevier, 2017-10)Please read abstract in the article.
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Igumbor, Emmanuel; Andrew, Richard Charles; Meyer, Walter Ernst (Springer, 2017-02)In this work, the results of density functional theory calculations for rare earth (Ce, Pr, Eu, and Er) interstitials in Ge are presented. We employed the hybrid functional of Heyd, Scuseria, and Ernzerhof (HSE06) for ...
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Igumbor, Emmanuel; Omotoso, Ezekiel; Tunhuma, Shandirai Malven; Danga, Helga Tariro; Meyer, Walter Ernst (Elsevier, 2017-10)Please read abstract in the article.
Now showing items 1-19 of 19