Curriculum Vitae

Centro de Ciências e Tecnologias Nucleares (C2TN)


Photo.

Name: Ulrich
Surnames: Wahl
Born: 1961 in Schwäbisch Gmünd (Germany)
Nationality: German

Phone: +351 21-994 6085
Fax: +351 21-994 6285
Email: uwahl (@ctn.tecnico.ulisboa.pt)


Education

  • 2007 – Habilitation (Agregação) in physics (Dr. habil.), Faculdade de Ciências, Universidade de Lisboa, Portugal.
  • 1993 – Doctoral degree in physics (Dr. rer. nat.), University of Konstanz, Germany.
  • 1987 – Diploma in physics (Dipl.-Phys.), University of Konstanz, Germany.

Professional Employment Career

  • Since 02/2006 – Principal Researcher, Unit of Physics and Accelerators, ITN (IST/ITN since 03/2012).
  • 2001-2006 – Post-doc at Instituto Tecnológico e Nuclear (ITN) in Sacavém funded by the Fundação para a Ciência e a Tecnologia (FCT).
  • Since 11/2001 – Member of Centro de Física Nuclear da Universidade de Lisboa (CFNUL).
  • Since 11/2001 – "Associated scientist" at the Instituut voor Kern- en Stralingsfysica (IKS) of the Katholieke Universiteit Leuven, Belgium.
  • 1996-2001 – Post-doc at the Instituut voor Kern-en Stralingsfysica (IKS) of the Katholieke Universiteit Leuven, Belgium.
  • 1993-1995 – Post-doc and scientific employee at the Rijksuniversiteit Groningen, Netherlands within the Human Capital and Mobility program of the European Commission.
  • 1989-1993 – Scientific employee at the University of Konstanz during the time of the PhD thesis.

Main Scientific Interests and Activities

  • Ion implanted electrical, optical and magnetic dopants and implantation damage annealing in technologically relevant semiconductors and oxides.
  • New systems for position-sensitive detection of channeling and blocking.
  • Author or co-author of 114 publications in refereed international journals and 224 conference contributions.
  • Acted as referee for the following journals: Acted as referee for the following journals: Physical Review Letters, Physical Review B, Journal of Applied Physics, Nuclear Instruments and Methods in Physics Research B, Physica B, Electrochemical and Solid State Letters, Journal of Luminescence, Materials Science and Engineering B, Hyperfine Interactions, Superlattices and Microstructures, Optical Materials.
  • 01/2007-01/2011 – Member of the ISOLDE and Neutron Time-of-Flight Experiments Committee (INTC) at CERN.
  • Since 11/2006 – Spokesperson of the CERN experiment IS453 "Emission channeling lattice location experiments with short-lived isotopes".
  • 1997-2006 – Spokesperson of the CERN experiment IS368 "Lattice location of transition metals and rare earths in semiconductors".

5 Selected Publications

  • L.M.C. Pereira, U. Wahl, S. Decoster, J.G. Correia, L.M. Amorim, M.R. da Silva, J.P. Araújo, A. Vantomme: Mixed Zn and O substitution of Co and Mn in ZnO, Physical Review B 84 (2011) 125204/1-6.
    Journal impact factor: 3.603 (5 year); Citations: 5.
  • L.M.C. Pereira, U. Wahl, J.G. Correia, S. Decoster, M.R. da Silva, J.P. Araújo, A. Vantomme: Direct Identification of Interstitial Mn in Heavily p-type Doped GaAs and Evidence of its high Thermal Stability, Applied Physics Letters 98 (2011) 201905/1-3. 
    Journal impact factor:  3.817 (5 year); Citations: 7.
  • S. Decoster, S. Cottenier, B. De Vries, H. Emmerich, U. Wahl, J.G. Correia, A. Vantomme: Transition Metal Impurities on the Bond-centered Site in Ge, Physical Review Letters 102 (2009) 065502/1-4.
    Journal impact factor: 7.435 (5 year); Citations: 14.
  • U. Wahl, J.G. Correia, S. Decoster, T. Mendonça: Direct Evidence for Sb as a Zn Site Impurity in ZnO, Applied Physics Letters 94 (2009) 261901/1-3.
     Journal impact factor:  3.817 (5 year); Citations: 16.

Other Publications

  • A. Vantomme, U. Wahl, and B. De Vries: "Lattice location of rare earth impurities in III-nitrides", chapter III in Rare-Earth doped III-Nitrides for Optoelectronic and Spintronic Applications, Springer series on Topics in Applied Physics, Vol. 124, edited by K.P. O’Donnell and V. Dierolf (2010) 55-98.
  • S. Decoster, S. Cottenier, B. De Vries, H. Emmerich, U. Wahl, J.G. Correia, and A. Vantomme: "Transition metal impurities on the bond-centered site in Ge", Physical Review Letters 102 (2009) 065502/1-4.
  • U. Wahl, J.G. Correia, E. Rita, J.P. Araújo, J.C. Soares, and the ISOLDE collaboration: "Lattice sites of implanted Fe in Si", Physical Review B 72 (2005) 014115/1-8.
  • U. Wahl, E. Rita, J.G. Correia, E. Alves, J.C. Soares, and the ISOLDE collaboration: "Direct evidence for As as a Zn-site impurity in ZnO", Physical Review Letters 95 (2005) 215503/1-4.
  • U. Wahl, E. Rita, E. Alves, J.G. Correia, J.P. Araújo, and the ISOLDE collaboration: "Implantation site of rare earths in single-crystalline ZnO", Applied Physics Letters 82 (2003) 1173-1175.
  • U. Wahl, A. Vantomme, G. Langouche, J.P. Araújo, L. Peralta, J.G. Correia, and the ISOLDE collaboration: "Emission channeling studies of Pr in GaN", Journal of Applied Physics 88 (2000) 1319-1324.
  • U. Wahl, A. Vantomme, G. Langouche, J.G. Correia, and the ISOLDE collaboration: "Lattice location and stability of ion implanted Cu in Si", Physical Review Letters 84 (2000) 1495-1498.
  • U. Wahl, A. Vantomme, J. De Wachter, R. Moons, G. Langouche, J.G. Marques, J.G. Correia, and the ISOLDE collaboration: "Direct evidence for tetrahedral interstitial Er in Si", Physical Review Letters 79 (1997) 2069-2072.
  • U. Wahl and the ISOLDE collaboration: Emission Channeling Studies of Li in Semiconductors, Physics Reports 280 (1997) 145-285.

Projects

  • 05/2007-10/2010: Principle researcher of the research project PTDC/FIS/66262/2006 on "Ion-implanted magnetic nanolayers of wide band gap semiconductors for spintronics applications", funded by the Foundation for Science and Technology (FCT), Portugal.
  • 09/2005-07/2008: Reponsible scientist at ITN in the Research Agreement 13325 with the International Atomic Energy Agency (IAEA), Vienna/Austria, on "Ion implantation doping of perovskites and related oxides" within IAEA’s Coordinated Research Project F1.20.16 "Ion beam modification of insulators".
  • Since 03/2009: Participating scientist in the European Collaborative Project SPIRIT 227012-CP-CSA-Infra (Support of Public and Industrial Research using Ion beam Technology), which is funded by the European Commission through its 7th Framework Program. Participating institutes
  • 2002-2006: Participating scientist in the European Research network RENiBEl (Rare Earth doped Nitrides for Bright Electroluminescent emitters), funded by the European Commission through its 5th Framework Program.
  • Since 1996: Participating scientist in various research projects on "Perturbed Angular Correlations and Electron Channeling Experiments at ISOLDE - applied materials research with nuclear techniques, training and development", promotor J.G. Correia, funded by the Foundation for Science and Technology (FCT), Portugal.
  • Since 02/2010: Participating scientist in the research project PTDC/FIS/100448/2008 on "Free-charge carrier properties and doping mechanisms of InN-based materials", responsible scientist V. Darakchieva, funded by the Foundation for Science and Technology (FCT), Portugal.
  • 04/2007–12/2010: Participating scientist in the research project PTDC/FIS/65233/2006 on "Ternary and quaternary nitride alloys for lattice matched heterostructures: Novel materials for high efficiency field effect transistors and optoelectronic devices", responsible scientist K. Lorenz, funded by the Foundation for Science and Technology (FCT), Portugal.
  • 2001-2007: Co-promotor (with Prof. André Vantomme, IKS Leuven, Belgium) of research project G.0210.02 on "Lattice location of impurities in semiconductors", financed by the Flemish Science Foundation (FWO).
  • 1996-2001: Participating scientist in the research project G.0307.96DN on "DX-centers in III-V semiconductors", promotor Prof. G. Langouche (IKS Leuven, Belgium), funded by the Flemish Science Foundation (FWO).