Jascha Repp

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Jascha Repp (born December 18, 1972 ) is a German physicist and lecturer at the University of Regensburg .

Repp graduated from the Waldorf School in Überlingen in 1992 . After working as a software developer in Aachen, civil service and a stay abroad in Spain, he studied physics at the Free University of Berlin from 1995 with a diploma in 1999. He then worked as a research assistant with Karl-Heinz Rieder and received his doctorate in 2002 (the dissertation scanning tunneling microscopy and spectroscopy on adsorbates Metal and insulator surfaces received the Ernst Reuter Prize) and was a post-doctoral student in Gerhard Meyer's group at the IBM Rüschlikon research laboratory . In 2007 he became Lichtenberg Professor at the University of Regensburg.

He examined individual atoms (adatoms), molecules and nanostructures on surfaces with scanning probe microscopy (especially scanning tunneling microscope (STM) and non-contact atomic force microscope (AFM) at low temperatures). In Regensburg he investigates such nanostructures and molecules on ultra-thin insulating films or adsorbates on surfaces (instead of, as is usually the case, on metals or semiconductors). In 2019, he succeeded in observing electron transfer between molecular orbitals, i.e. the change in orbitals during chemical reactions. To do this, he used a novel combination of STM and AFM with molecules on an insulating surface. Previously, the charge states of orbitals could be observed with AFM (Repp was involved in the detection in 2009), but not in the outer shell, and a conventional STM based on current measurement required a conductive base, which only allowed a stable charge state. In the new STM variant, they used an extremely weak alternating current (consisting only of the oscillations of an electron between the tip and the molecule).

In 2005 he received an Outstanding Technical Achievement Award from IBM and in 2012 with Leo Gross and Gerhard Meyer the Feynman Prize in Nanotechnology .

Fonts (selection)

  • with L. Gross, F. Mohn, G. Meyer, FJ Giessibl : Atomic charge states under the atomic force microscope, Physics in Our Time, Volume 40, 2009, Issue 5
  • with L. Gross, F. Mohn, P. Liljeroth, FJ Giessibl, G. Meyer: Measuring the Charge State of an Adatom with Noncontact Atomic Force Microscopy, Science 324, 2009, p. 1428
  • with L. Gross, F. Mohn, G. Meyer, Matthew Dyer, Mats Persson: Reversible Bond Formation in a Gold-Atom-Organic-Molecule Complex as a Molecular Switch, Phys. Rev. Lett., Volume 105, 2010
  • with LL Patera a. a .: Mapping orbital changes upon electron transfer with tunneling microscopy on insulators, Nature, Volume 566, 2019, p. 245

Web links

Individual evidence

  1. ↑ Date of birth of the curriculum vitae in his dissertation
  2. ↑ Online edition of the dissertation at the Free University of Berlin
  3. ↑ Atomic-Scale Science on Insulating Films , Repp Working Group, University of Regensburg, accessed March 26, 2019
  4. ↑ When electrons make themselves comfortable , Pro Physik, February 15, 2019
personal data
SURNAME Repp, Jascha
BRIEF DESCRIPTION German physicist
DATE OF BIRTH 18th December 1972