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1.
Contactless doping characterization of ${\mathrm{Ga}_{2}\mathrm{O}_{3}}$ using acceptor Cd probes / Barbosa, Marcelo B (Porto U. ; Singapore Natl. U.) ; Correia, João Guilherme (IST/ITN, Lisbon ; CERN) ; Lorenz, Katharina (Lisbon, IST) ; Lopes, Armandina M L (Porto U.) ; Oliveira, Gonçalo N P (Porto U.) ; Fenta, Abel S (CERN ; Aveiro U. ; Leuven U.) ; Schell, Juliana (CERN ; U. Duisburg-Essen) ; Teixeira, Ricardo (IST, Lisbon (main)) ; Nogales, Emilio (Madrid U.) ; Méndez, Bianchi (Madrid U.) et al.
Finding suitable p-type dopants, as well as reliable doping and characterization methods for the emerging wide bandgap semiconductor $\beta$-${\mathrm{Ga}_{2}\mathrm{O}_{3}}$ could strongly influence and contribute to the development of the next generation of power electronics. In this work, we combine easily accessible ion implantation, diffusion and nuclear transmutation methods to properly incorporate the Cd dopant into the $\beta$-${\mathrm{Ga}_{2}\mathrm{O}_{3}}$ lattice, being subsequently characterized at the atomic scale with the Perturbed Angular Correlation (PAC) technique and Density Functional Theory (DFT) simulations. [...]
2022 - 9 p. - Published in : Sci. Rep. 12 (2022) 14584 Fulltext: PDF;
2.
Electronic structure, lattice location and stability of dopants in wide band gap semiconductors / Baptista Barbosa, Marcelo
The importance of functional nanomaterials, such as nanowires (NW) and thin films, in science and technology has been increasing exponentially over the years [...]
CERN-THESIS-2018-484 - 154 p.

3.
In and Cd as defect traps in titanium dioxide / Schell, Juliana (CERN ; Duisburg-Essen U.) ; Lupascu, Doru C (Duisburg-Essen U.) ; Martins Correia, João Guilherme (CERN ; IST, Lisbon (main)) ; Carbonari, Artur Wilson (U. Sao Paulo (main)) ; Deicher, Manfred (Saarland U.) ; Barbosa, Marcelo Baptista (Porto U.) ; Mansano, Ronaldo Domingues (U. Sao Paulo (main)) ; Johnston, Karl (CERN) ; Ribeiro, Ibere S (U. Sao Paulo (main)) /ISOLDE
We present a study of TiO$_2$ single crystals from the point of view of the dopant atom that simultaneously behaves as the probing element. We used gamma-gamma time dependent perturbed angular correlations working with selected tracer elements ($^{111}$In/ $^{111}$Cd, $^{111m}$Cd/ $^{111}$Cd) together to investigate the different behavior of Cd and In dopants, particularly their interaction with point defects in the TiO$_2$ lattice. [...]
2016 - Published in : Hyperfine Interact. 238 (2016) 2 External link: Link to the fulltext on HFI2016 document server
In : International Conference on Hyperfine Interactions and their Applications, Leuven, Belgium, pp.2
4.
Perturbed Angular Correlation Study of the Static and Dynamic Aspects of Cadmium and Mercury Atoms Inside and Attached to a C60 Fullerene Cage / Das, Satyendra K (Bhabha Atomic Res. Ctr.) ; Guin, Rashmohan (Bhabha Atomic Res. Ctr.) ; Banerjee, Debasish (Bhabha Atomic Res. Ctr.) ; Johnston, Karl (CERN) ; Das, Parnika (Calcutta, VECC) ; Butz, Tilman (Leipzig U.) ; Amaral, Vitor S (U. Aveiro (main) ; Aveiro U.) ; Correia, Joao G (CERN ; ITN, Sacavem) ; Barbosa, Marcelo B (CERN ; ITN, Sacavem)
30 keV Cd-111m and 50 keV Hg-199m beams from ISOLDE were used to implant on preformed targets of C-60 with a thickness of 1 mg cm(-2). Endofullerene compounds, viz. [...]
2014 - 8 p. - Published in : Z. Naturforsch. A 69 (2014) 611-618

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