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A. Zubiaga
Researcher at ETH Zurich
Publications - 33
Citations - 854
A. Zubiaga is an academic researcher from ETH Zurich. The author has contributed to research in topics: Positron annihilation spectroscopy & Vacancy defect. The author has an hindex of 15, co-authored 32 publications receiving 800 citations. Previous affiliations of A. Zubiaga include Helsinki University of Technology & Aalto University.
Papers
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Journal ArticleDOI
Self-compensation in semiconductors: the Zn-vacancy in Ga-doped ZnO
David C. Look,Kevin D. Leedy,Lasse Vines,B. G. Svensson,A. Zubiaga,Filip Tuomisto,D. R. Doutt,Leonard J. Brillson +7 more
TL;DR: In this article, a new theoretical formalism and several different experimental techniques were used to demonstrate that the addition of 1.4 \ifmmode\times\else\texttimes\fi{} 10${}^{21}$-cm${}^{\ensuremath{-}3}$ Ga donors in ZnO causes the lattice to form 1.7 \ifmodes\times \else\ texttimes\fa{}
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Zinc vacancy and oxygen interstitial in ZnO revealed by sequential annealing and electron irradiation
K. E. Knutsen,Augustinas Galeckas,A. Zubiaga,Filip Tuomisto,G. C. Farlow,B. G. Svensson,A. Yu. Kuznetsov +6 more
TL;DR: In this article, a strong indication that oxygen interstitials act as dominating acceptor is derived from the analysis of charge carrier losses induced by electron irradiation with variable energy below and above the threshold for Zn-atom displacement.
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Identification of substitutional Li in n-type ZnO and its role as an acceptor
Klaus Magnus H Johansen,A. Zubiaga,Ilja Makkonen,Filip Tuomisto,P. T. Neuvonen,K. E. Knutsen,Edouard Monakhov,A. Yu. Kuznetsov,B. G. Svensson +8 more
TL;DR: Identification of substitutional Li in n-type ZnO and its role as an acceptor is presented.
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Zinc vacancies in the heteroepitaxy of ZnO on sapphire: Influence of the substrate orientation and layer thickness
A. Zubiaga,Filip Tuomisto,Fernando Plazaola,Kimmo Saarinen,José Ángel García,J. F. Rommeluère,Jesús Zúñiga-Pérez,Vicente Muñoz-Sanjosé +7 more
TL;DR: In this paper, the authors used positron annihilation spectroscopy to study the vacancy-type defects produced in films grown by metalorganic chemical vapor deposition on different sapphire orientations.
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Positron annihilation lifetime spectroscopy of ZnO bulk samples
A. Zubiaga,Fernando Plazaola,José Ángel García,Filip Tuomisto,Vicente Muñoz-Sanjosé,Ramón Tena-Zaera +5 more
TL;DR: In this article, positron annihilation lifetime spectroscopy was performed on bulk samples annealed under different atmospheres and two different vacancy-type defects were identified in the samples: Zn vacancy complexes (V{sub Zn}-X) and vacancy clusters consisting of up to five missing Zn-O pairs.