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, 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

  • 2019 – Guest Professor and Senior Research Fellow at Quantum Solid State Physics (QSP), KU Leuven, Belgium (on leave of absence from IST).
  • 09/2017 to 06/2018 – Guest Professor at IKS, KU Leuven (on sabbatical leave from IST).
  • Since 2012 – Principal Researcher, Instituto Superior Técnico, Campus Tecnológico e Nuclear.
  • Since 01/2015 – Member of Centro de Ciências e Tecnologias Nucleares (C2TN).
  • 2006-2011 – Principal Researcher, Instituto Superior Técnico, Campus Tecnológico e Nuclear.
  • 2001-2015 – Member of Centro de Física Nuclear da Universidade de Lisboa (CFNUL).
  • 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 – "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 beam modification and ion beam analysis of advanced materials
  • ;
  • - Dopants and impurities in technologically relevant semiconductors and oxides;
  • - Defects in solids for quantum applications;
  • - Radioactive ion beams for use in materials science;
  • - Nuclear methods in solid state physics;
  • - Position-sensitive Si detectors in ion beam analysis and electron emission channeling.
  • Author or co-author of 157 publications in refereed international journals and 298 conference contributions.
  • Acted as referee for the following journals: Physical Review Letters, Physical Review B, Journal of Applied Physics, Materials Letters, 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, Diamond and Related Materials, Superlattices and Microstructures, Optical Materials.
  • Since 06/2020 – Spokesperson of the CERN experiment IS668 "Quantum colour centers in diamond studied by emission channeling with short-lived isotopes (EC-SLI) and radiotracer photoluminescence".
  • 2016/2020 – Spokesperson of the CERN experiment IS634 "Emission channeling with short-lived isotopes (EC-SLI) of acceptor dopants in nitride semiconductors".
  • 2006/2016 – Spokesperson of the CERN experiment IS453 "Emission channeling lattice location experiments with short-lived isotopes".
  • 01/2007-01/2011 – Member of the ISOLDE and Neutron Time-of-Flight Experiments Committee (INTC) at CERN.
  • 1998-2007 – Spokesperson of the CERN experiment IS368 "Lattice location of transition metals and rare earths in semiconductors".

5 Selected Publications

  • U. Wahl, J.G. Correia, R. Villareal, E. Bourgeois, M. Gulka, M. Nesladek, A. Vantomme, and L.M.C. Pereira: "Direct structural identification and quantification of the split-vacancy configuration for implanted Sn in diamond", Physical Review Letters 125 (2020) 045301/1-7.
    Journal impact factor: 8.385, Citations: 1.
  • U. Wahl, L.M. Amorim, V. Augustyns, A. Costa, E. David-Bosne, T.A.L. Lima, G. Lippertz, J.G. Correia, M.R. da Silva, M.J. Kappers, K. Temst, A. Vantomme, and L.M.C. Pereira: "Lattice location of Mg in GaN: A fresh look at doping limitations", Physical Review Letters 118 (2017) 095501/1-5.
    Journal impact factor: 8.385, Citations: 21.
  • 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.
    Journal impact factor: 8.385, Citations: 82.
  • U. Wahl and the ISOLDE collaboration: "Emission channeling studies of Li in semiconductors", Physics Reports 280 (1997) 145-285.
    Journal impact factor: 25.798, Citations: 46.
  • 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.
    Journal impact factor: 8.385, Citations: 70.

Other Publications

  • L.M.C. Pereira, A. Vantomme, and U. Wahl: “Characterizing defects with ion beam analysis and channeling techniques", chapter 11 in Characterisation and Control of Defects in Semiconductors, edited by F. Tuomisto (The Institution of Engineering and Technology, Stevenage, UK, 2019), p 501-561.
  • 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 (Springer, New York, 2010) 55-98.
  • 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, 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. 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.

Projects

  • 01/2021-anticipated 12/2022: CERN/FIS-TEC/0003/2019 on "Material’s Research with Radioactive Isotopes and Nuclear Techniques at ISOLDE-CERN", principal investigator J.G. Correia.
  • 07/2018-12/2020: CERN/FIS-PAR/0005/2017 on "Portugal at ISOLDE: Materials and Nuclear Physics Research with Radioactive Isotopes and Techniques", principal investigator J.G. Correia.
  • 02/2010-01/2013: 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.
  • 03/2009-08/2013: 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.
  • 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.
  • 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".
  • 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.
  • 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).
  • Since 1996: Participating scientist in 17 FCT-funded research projects involving Electron Emission Channeling Experiments at ISOLDE.