da Silva, Manuel Ribeiro - Search Results

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Lattice Location Studies of the Amphoteric Nature of Implanted Mg in GaN / IS634 Collaboration
Despite the renewed interest in ion implantation doping of GaN, efficient electrical activation remains a challenge. The lattice location of $^{27}$Mg is investigated in GaN of different doping types as a function of implantation temperature and fluence at CERN's ISOLDE facility. [...]
2021 - 10 p. - Published in : Advanced Electronic Materials 7 (2021) 2100345 Submitted version, due to embargo period until 19.6.2022: PDF; Supporting Information: PDF;

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Lattice sites of implanted Na in GaN and AlN in comparison to other light alkalis and alkaline earths / Wahl, Ulrich (Universidade de Lisboa (PT)) ; David Bosne, Eric (Universidade de Lisboa (PT)) ; Amorim, Lígia (KU Leuven) ; Granadeiro Costa, Angelo Rafael (Universidade de Lisboa (PT)) ; De Vries, Bart (KU Leuven) ; Martins Correia, Joao (Universidade de Lisboa (PT)) ; da Silva, Manuel Ribeiro (CICECO Aveiro) ; Da Costa Pereira, Lino Miguel (KU Leuven (BE)) ; Vantomme, André (KU Leuven) /IS634 Collaboration
The lattice location of ion implanted radioactive 24Na (t1/2=14.96 h) in GaN and AlN was determined using the emission channeling technique at the ISOLDE/CERN facility. In the room temperature as-implanted state in both GaN and AlN, the majority of the sodium atoms are found on interstitial sites near the octahedral position, with a minority on cation Ga or Al substitutional sites. [...]
CERN-ISOLDE-2021-003.- 2020 - 12 p. - Published in : J. Appl. Phys. 128 (2020) 045703 Postprint: PDF; Supplemental Material: PDF;

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Emission channeling lattice location experiments with short-lived isotopes / Wahl, Ulrich (Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Sacavém, Portugal) ; Amorim, Lígia Marina (Instituut voor Kern- en Stralingsfysica (IKS), KU Leuven, Belgium) ; Araújo, João Pedro (Departamento de Física, Universidade do Porto, Portugal) ; Augustyns, Valérie (Instituut voor Kern- en Stralingsfysica (IKS), KU Leuven, Belgium) ; Bharuth-Ram, Krish (University of KwaZulu Natal, Durban, South Africa) ; David-Bosne, Eric (Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Sacavém, Portugal) ; Correia, João Guilherme (Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Sacavém, Portugal) ; Costa, Ângelo (Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Sacavém, Portugal) ; Miranda, Pedro (Departamento de Física, Universidad de Chile, Santiago, Chile) ; Pereira, Lino Miguel da Costa (Instituut voor Kern- en Stralingsfysica (IKS), KU Leuven, Belgium) et al.
CERN-INTC-2014-001 ; INTC-P-218-ADD-2. - 2014.
Fulltext - Original Document (INTC-P-218)

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Lattice location and thermal stability of implanted nickel in silicon studied by on-line emission channeling / Silva, Daniel José (Porto U.) ; Wahl, Ulrich (IST/ITN, Lisbon) ; Correia, Joaõ Guilherme (IST/ITN, Lisbon) ; Pereira, Lino Miguel da Costa (Leuven U.) ; Amorim, Lígia Marina (Leuven U.) ; da Silva, Manuel Ribeiro (Lisbon U., CFNUL) ; David-Bosne, Eric (IST/ITN, Lisbon ; Aveiro U.) ; Araújo, João Pedro (Porto U.) /EC-SLI Collaboration
We have studied the lattice location of implanted nickel in silicon, for different doping types (n, n$^{+}$ and p$^{+}$). By means of on-line emission channeling, $^{65}$Ni was identified on three different sites of the diamond lattice: ideal substitutional sites, displaced bond-center towards substitutional sites (near-BC) and displaced tetrahedral interstitial towards anti-bonding sites (near-T). [...]
CERN-OPEN-2014-018.- Porto, Portugal : Porto U., 2013 - 10 p. - Published in : J. Appl. Phys. 115 (2013) 023504 Preprint: PDF;

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Minority anion substitution by Ni in ZnO / Pereira, Lino Miguel da Costa (Leuven U.) ; Wahl, Ulrich (IST/ITN, Lisbon) ; Correia, João Guilherme (IST/ITN, Lisbon) ; Amorim, Lígia Marina (Leuven U.) ; Silva, Daniel José (Porto U.) ; David-Bosne, Eric (IST/ITN, Lisbon ; Aveiro U.) ; Decoster, Stefan (Leuven U.) ; da Silva, Manuel Ribeiro (Lisbon U., CFNUL) ; Temst, Kristiaan (Leuven U.) ; Vantomme, André (Leuven U.) /EC-SLI Collaboration
We report on the lattice location of implanted Ni in ZnO using the $\beta$− emission channeling technique. In addition to the majority substituting for the cation (Zn), a significant fraction of the Ni atoms occupy anion (O) sites. [...]
CERN-OPEN-2014-011.- Leuven : Instituut voor Kern- en Stralingsfysica, KU Leuven, 2013 - 4 p. - Published in : Appl. Phys. Lett. 103 (2013) 091905 Preprint: PDF;

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A versatile apparatus for on-line emission channeling experiments / da Silva, Manuel Ribeiro (Lisbon U., CFNUL) ; Wahl, Ulrich (IST/ITN, Lisbon) ; Correia, João Guilherme (IST/ITN, Lisbon) ; Amorim, Lígia Marina (Leuven U.) ; Pereira, Lino Miguel da Costa (Leuven U.)
The concept and functionality of an apparatus dedicated to emission channeling experiments using short-lived isotopes on-line at ISOLDE/CERN is described. The setup is assembled in two functional blocks - (a) base stand including beam collimation, implantation and measurement chamber, cryogenic extension, and vacuum control system and - (b) Panmure goniometer extension including maneuvering cradle and sample heating furnace. [...]
CERN-OPEN-2014-005.- Lisbon : Lisbon U., CFNUL, 2013 - 17 p. - Published in : Rev. Sci. Instrum. 84 (2013) 073506 Preprint: PDF;

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Mixed Zn and O substitution of Co and Mn in ZnO / Pereira, Lino Miguel da Costa (Leuven U. ; ITN, Sacavem ; Porto U.) ; Wahl, Ulrich (ITN, Sacavem ; Lisbon U., CFNUL) ; Decoster, Stefan (Leuven U.) ; Correia, João Guilherme (ITN, Sacavem ; Lisbon U., CFNUL) ; Amorim, Lígia Marina (Leuven U.) ; da Silva, Manuel Ribeiro (Lisbon U., CFNUL) ; Araújo, João Pedro (Porto U.) ; Vantomme, André (Leuven U.) /EC-SLI Collaboration
The physical properties of an impurity atom in a semiconductor are primarily determined by the lattice site it occupies. In general, this occupancy can be correctly predicted based on chemical intuition, but not always. [...]
CERN-OPEN-2014-004.- Leuven, Belgium : KU Leuven, 2011 - 6 p. - Published in : Phys. Rev. B 84 (2011) 125204 Preprint: PDF;

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