Nanostructures and thin films of transparent conductive oxides studied by perturbed angular correlations

Authors

  • M. B. Barbosa,

    Corresponding author
    1. IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
    • Phone: (+351) 22 04 02 362, Fax: (+351) 22 04 02 406
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  • J. N. Gonçalves,

    1. Departamento de Física and CICECO, Universidade de Aveiro, Campus Universitário de Santiago, P-3810-193 Aveiro, Portugal
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  • A. Redondo-Cubero,

    1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
    2. Centro de Física Nuclear da Universidade de Lisboa, Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal
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  • S. M. C. Miranda,

    1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
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  • R. Simon,

    1. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
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  • P. Kessler,

    1. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
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  • M. Brandt,

    1. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
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  • F. Henneberger,

    1. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany
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  • E. Nogales,

    1. Facultad de Ciencias Físicas, Departamento de Física de Materiales, Universidad Complutense, 28040 Madrid, Spain
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  • B. Méndez,

    1. Facultad de Ciencias Físicas, Departamento de Física de Materiales, Universidad Complutense, 28040 Madrid, Spain
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  • K. Johnston,

    1. Technische Physik, Universität des Saarlandes, 66041 Saarbrücken, Germany
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  • E. Alves,

    1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
    2. Centro de Física Nuclear da Universidade de Lisboa, Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal
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  • R. Vianden,

    1. Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany
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  • J. P. Araújo,

    1. IFIMUP and IN-Institute of Nanoscience and Nanotechnology, Departamento de Física e Astronomia da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
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  • K. Lorenz,

    1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
    2. Centro de Física Nuclear da Universidade de Lisboa, Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal
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  • J. G. Correia

    1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
    2. Centro de Física Nuclear da Universidade de Lisboa, Avenida Professor Gama Pinto 2, 1649-003 Lisboa, Portugal
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Abstract

The versatility of perturbed angular correlations (PAC) in the study of nanostructures and thin films is demonstrated, namely for the specific cases of ZnO/CdxZn1−xO thin films and Ga2O3 powder pellets and nanowires, examples of transparent conductive oxides. PAC measurements as a function of annealing temperature were performed after implantation of 111mCd/111Cd (T1/2 = 48 min) and later compared to density functional theory simulations. For ZnO, the substitution of Cd probes at Zn sites was observed, as well as the formation of a probe-defect complex. The ternary CdxZn1−xO (x = 0.16) showed good macroscopic crystal quality but revealed some clustering of local defects around the probe Cd atoms, which could not be annealed. In the Ga2O3 samples, the substitution of the Cd probes in the octahedral Ga-site was observed, demonstrating the potential of ion-implantation for the doping of nanowires.

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