Personal Data

Jooss Prof.Dr.
Christian Jooss
Gruppenleiter
Date of Birth: January,10.1967
in Stuttgart / European Citizen(Germany)


Education


  • 10/88-04/95 Diplom in Physics, University of Stuttgart, Germany
    Thesis: Magneto-optical investigations of the micro structural influences on the current carrying capability of high-temperature superconductors.
  • 09/95-06/98 Ph. D. Max-Planck Institute for Metal Research, Stuttgart, Germany, Thesis: Pinning mechanism of flux lines in YBaCuO films.
  • 12/2002 Habilitation in Experimental Physics at the University of Göttingen
    Topic: "Current transport in high-temperature superconductors"



Employments


  • 03/94-04/95 Teaching assistant, University of Stuttgart, Germany.
  • 09/95-01/98 Scientific research employee, Max-Planck-Institute for Metal Research, Stuttgart, Germany.
  • 01/98-08/98 Research Scientist, Max-Planck Institute for Metal Research, Stuttgart, Germany.
  • 09/98-01/2004 Scientific assistant, Institute of Materials Physics, University of Göttingen, group of Prof. Dr. H. C. Freyhardt.
  • 01/2004-01/2006 Senior Research Scientist, Institute of Materials Physics, University of Göttingen
  • 02/2006-08/2006 Sabbatical at Brookhaven National Laboratory, Prof. Y. Zhu, Center for Functional Nanomaterials: Advanced methods of analytical transmission electron microscopy.
  • 09/2006-08/2008 Senior Research Scientist, Institute of Materials Physics, University of Göttingen
    Since 09/2008 Full Professor (W2) at the University of Goettingen, Institute of Materials Physics


Research area: Nanoscale multifunctional oxides 

Metal oxide compounds reveal a broad richness of physical phenomena spanning from hightemperature superconductivity and resistance changes in external fields to new mechanisms for energy conversion in thermoelectric, photovoltaic or photocatalytic processes. The strong correlation of electronic, magnetic and atomic degrees of freedom gives rise to a novel complexity, where e.g. an electrical current can change the crystal structure or a mechanical stimulation can alter the electric resistivity. The fundamental understanding of mechanisms at interfaces in these fascinating class of multifunctional materials offers new opportunities for the development of applications in high-efficiency electronic devices and renewable energy-conversion.
 
Methods: Nanoscale materials preparation and in-situ TEM 


Materials design of nanostructured complex oxides, multilayers and interfaces is performed by ion beam, rf and magnetron sputtering as well as pulsed laser deposition combined with artificial and self-organized patterning processes on various length scales. Materials include manganites (Pr1xCaxMnO3, La1-xSrxMnO3), Cobaltites (Pr1-xCaxCoO3), Titanites (SrTi1-xNbxO3, BaTiO3), Ferrites (CoFe2O4), nanocomposites (BaTiO3 / CoFe2O4 and CoFe2O4 / La1-xSrxMnO3) as well as metaloxide heterostructures. In order to determine structure property relations, we use various highresolution analytical techniques for structure, chemical composition, magnetic properties, thermal and electric transport. A focus is in-situ and analytical transmission electron microscopy allowing for high-resolution electrical, optical and photovoltaic measurements in a transmission electron microscope together with atomic column resolution structural, chemical and electronic analysis.   

Selection of lectures

  • Order, disorder and self-organization in solid state and materials physics (WS 2003/2004)
  • Materials physics (WS 2004/2005)
  • Atom- and quantum physics, with 25 new experiments for demonstration (SS 2005)
  • Thin films (WS 2005/2006)  
  • Modern materials and nanostructures (WS 2006/2007)
  • Nanopatterned materials (WS 2007/2008)
  • Materials for renewable energy applications (SS 2008, SS 2009)
  • Materials research with electrons (WS 2008/2009, SS 2010)
  • Master course in materials science (WS 2009/2010)
 
Organisation of conferences

10. International Workshop on Critical Currents, Göttingen, 4.-7. Juni 2001, with  
                                Prof. H. C. Freyhardt

Spring conference of Deutsche Physikalische Gesellschaft, solid state physics
 
                                Scientific program of the section "Low Temperature Physics"
                                in the years 2000 (Regensburg) and 2001 (Hamburg)
                                together with Prof. H. C. Freyhardt
 
E-MRS Spring Meeting 2007, Strasbourg, May 28. - June 1. 2007, Symposium H,
                                together with F. Sandiumenge, W. Prellier and J.-M. Casanove:
 
                                Nanoscale tailoring of defect structures for optimized functional and
                                multifunctional oxide films

Materials for Energy 2010, Karlsruhe, July 5.-8. (Dechema + MRS)
                                Symposium "Solar fuels / Artifical photosynthesis"

"Thermal conductivity in reduced dimensions: 3 Omega method and beyond" 

                                Göttingen, May 27./28. 2010 Organised by the
                                German Priority Program SPP 1386 and
                                 Institute of Materials Physics, University of Göttingen
 
 
Visits abroad
04/1991Facultat de Sciencas Naturales, Universidad Autonoma, Buenos Aires, Argentina
12/2000Brookhaven National Laboratory, USA, D. Welch and Y. Zhu. Investigation of grain boundaries in high-temperature superconductors
04/2002University of Cambridge, Department of Materials Science and Metallurgy, J. Evetts. Cooperation on flux pinning in vicinal superconducting films
02-08/2006Sabbatical at Brookhaven National Laboratory, USA, Center for Functional Nanomaterials, Y. Zhu, Advanced TEM study on manganites
02-03/2010Brookhaven National Laboratory, USA, Center for Functional Nanomaterials, Advanced TEM experiments

 
Referee
Scientific journals: Nature, Physical Review Letters, Physical Review B, Europhysics Letters, Applied Physics Letters, Journal of Applied Physics, Physica C, Superconducting Science and Technology, u.a.
Referee for the Deutsche Forschungsgemeinschaft: since 2005
 
Memberships
  • German Physical Society
  • Materials Research Society, USA
  • Scientific committee of the Open University
  • Founder member of the Institute of research and education (IFB), Göttingen
  • Member in the Society of Scientists for Peace in Göttingen, e. V.
 
Invited talks (last 5 years)

JahreVeranstaltungsorte
06/2010Microscience, June 28. 1. July 2010  Excel, London
In-situ TEM studies of multifunctional properties in oxide perovskites: Colossal resistance effects and catalytic processes in PrCaMnO
03/2010Spring conference of the German Physical Society, Regensburg
Interfaces in multifunctional perovskite oxides
11/2009Physical-colloquium, University of Braunschweig, Germany
Interfaces in strongly correlated oxide materials
08/2009Conference on Thermodynamics and Transport Kinetics of Nanostructured Materials (TTk), Münster, Germany
Interfaces in strongly correlated oxide materials
06/2009Workshop on solid state physics, Niedersachsen
Interfaces in strongly correlated oxide materials
01/2008Plenary talk at the 37. Winter Meeting on Statistical Physics, Taxco, Mexico
Electronic correlation and ordering in solids: Strolling through the fields of colossal resistance effects and high-temperature superconductivity
06/2008Physical-colloquium, University of Bonn, Germany
Elektronische Korrelation und Ordnung: Vom ferroelektrischen Isolator zum  Hochtemperatur-Supraleiter
09/2007International Conference "Solid State Chemistry and Modern Micro- and Nanotechnologies", Kislovodsk, Russia
05/2007International Workshop ?Superconductivity and Magnetism in the Perovskites and other Novel Materials?, Ramat Gan, Tel Aviv, Israel
Interplay of multiferroic behavior, electronic phase separation and colossal  resistance effects in Pr1-xCaxMnO3
06/2006Nanoseminar of the Brookhaven National Laboratory, Upton, New York:  
Magnetostatic interactions in small hard magnetic patterns
12/2005Public Lectures on Nanotechnique for the society, organized by the Nanotechnology Center CC UPOB e.V., Braunschweig:  
Flussquanten als Nanoobjekte in Hochtemperatur-Supraleitern: Fundamentale Einsichten und Anwendungen
05/2005Minerva Workshop on Superconductivity and Applications, Barylan University, Israel  
Space and time resolved imaging of flux dynamics at grain boundaries and other defects in HTS
04/2005SCENET Workshop Rust, Austria
 Modifying the current distribution of grain boundaries in YBaCuO thin films.