Curriculum Vitae
17. 12. 1946      Date of birth

1953-1966         School education in Düsseldorf, Germany. Abitur (high school diploma) 1966

1966-1968         Military service - final rank: Second Lieutenant

1968-1973         Undergraduate education in physics at Aachen Technical University
                            Diplom-Physiker (eq. Master of Science) 1973

1973-1976         Ph.D. studies at Queen Mary College, University of London, Great Britain; 
                            Doctor of Philosophy (Ph.D.) 1976

1976-1978         Post-doctoral position at the Fritz-Haber-Institut of the Max-Planck-Gesellschaft,
                            with Prof. A. M. Bradshaw

1978…               Staff scientist at the Fritz-Haber-Institut, with an independent research group

1984                   "Privatdozent" (senior lecturer), Department of Physics, Freie Universität Berlin

1995                   Adjunct Professor, Department of Physics, Freie Universität Berlin

1997                   Elected Fellow of the American Vacuum Society

General scientific activities
  • Author and co-author of about 270 refereed scientific publications, many in high
profile journals, cited more than 12,000 times in refereed journals. H-index = 51,
average citations per paper = 42
  • Adviser for about 30 Ph.D. and Diploma theses
  • Frequent teaching assignments at the Freie Universität Berlin
  • Frequent participant in special research units (“Sonderforschungsbereich”) with
Berlin universities
  • Many funded international collaborations with groups in the US, Chile, India,
Spain, Denmark, Italy (specifically Dr. E. Rotenberg, ALS, LBL Berkeley, USA)
  • Frequent external referee for scientific papers (“Outstanding Referee”, American
Physical Society 2010), Ph.D. theses, proposals, prizes, and academic positions

Other professional activities
  • Administrative Director, Fritz Haber Institute, 2003 – 2011
  • Chairman, Beamtime Review Committee, ELETTRA Synchrotron Light Source,Trieste, Italy (1998 – 2004)
  • Member, Beamtime Review Committee, BESSY Synchrotron Light Source,Berlin (2006 – 2009)
  • Member, Scientific Advisory Committee, ELETTRA Synchrotron Radiation Light Source, Trieste, Italy, from 2012 onwards.
  • “Ombudsman” for the staff of the Fritz-Haber-Institut
  • Co-ordinator of the International Max Planck Graduate Research School „Complex Surfaces in Materials Science“ , Fritz Haber Institute, Freie Universität Berlin, Humboldt-Universität Berlin, 2003 - 2005
  • Co-ordinator of Department of Surface Science, Fritz Haber Institute (1999 – 2002)
  • Co-ordinator, Max Planck Society beamlines at the BESSY Synchrotron Light Source, (1998 – 2011)

Graphene and its relatives, and their fascinating electronic structure

Karsten Horn*

Fritz Haber Institute of the Max Planck Society


        It is roughly ten years ago that two publications about graphene, the single layer of hexagonally coordinated carbon, caused a storm of excitement in the solid state physics community, and led to a worldwide surge of activities that shows no sign of abatement. Indeed, the discovery of the unusual properties of graphene has opened a new chapter in solid state physics, encompassing single and few layers of a large variety of other 2D materials. The talk will deal with the basics of the electronic structure of graphene and some of its relatives, both in its pristine (“quasi free standing”) form and in its interaction with substrates and adsorbates/overlayers. I will show how the methods of surface/interface science, and angle-resolved photoemission in particular, are of enormous importance for the study of graphene’s electronic structure in general. Investigations of these 2D materials have brought our understanding of electronic structure and carrier dynamics in general to new levels of sophistication, for example in the band structure of single and bilayer/multilayer graphene, where the shape of the bands at the so-called Dirac point (giving rise to the massless character of charge carriers at the Fermi level) can be strongly modified, for example through superlattices brought about by small twists between layers. An important aspect in these studies is the possibility to induce ambipolar doping by chemical means, to change the position of the Fermi level over a wide range. New graphene-related system can be prepared by intercalating different metals in between graphene and a substrate, for example ferromagnetic metals such that graphene may be used as a spin filter. I will also briefly cover other emerging 2D materials such as hexagonal boron nitride, the transition metal dichalcogenides and, more recently, hexagonal variants of group IV materials (e.g silicene). Results from these demonstrate that a vast field has opened up, full of surprises and novel solid state physics aspects. 

* work performed in close collaboration of my group with Aaron Bostwick, Andrew Walter, Jessica McChesney, Taisuke Ohta, Eli Rotenberg, Lawrence Berkeley Laboratory, USA, and Thomas Seyller, University of Erlangen/Technical University of Chemnitz, Germany

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