Technical University Dresden
Institute for Theoretical Physics
01062 Dresden, Germany
Zellescher Weg 17, room A 101
Possible diploma theses:
Possible doctoral theses,
Please contact me
Secretary Ms. Latus
and by appointment
Welcome to my personal home page at the Technical University Dresden.
I am Professor for Condensed Matter Theory at the Department of Physics of the Technical University Dresden. Until 2008, I was Assistant Professor at the Department of Physics and Astronomy of the University of Kansas.
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I am interested in nanoscopic physics, non-equilibrium phenomena, and systems in which electron-electron interactions play a crucial role. A few characteristic topics are discussed here.
One field of work deals with transport through
single molecules. It is now possible to connect small molecules to metallic
contacts and measure the current-voltage characteristics of this type of
nanoelectronic device. Here, interesting physics is observed, such as the Kondo
effect and Coulomb blockade. Internal degrees of freedom of the molecules
excited by tunneling electrons, such as vibrations and spin excitations, are
important for the transport properties. My work has mainly dealt with molecules carrying local magnetic moments.
I try to make methodological progress in the theory of transport through such devices. I am also studying specific molecules, partly in collaboration with experimental groups.
Another field of interest concerns magnetism,
in particular in relation to disorder and transport. I investigate
diluted magnetic semiconductors, which are created by doping conventional
semiconductors like GaAs with magnetic ions such as manganese. One goal is to
better understand the mechanism of ferromagnetic ordering in this and related
systems. Disorder plays an important role in these materials (they are rather
"dirty") and I try to understand how this affects the magnetic ordering and
electronic transport (i.e., currents).
Electronic correlations are also important. This means that one cannot
understand the physics by considering just a single electron interacting with an
effective background charge distribution but has to take the interaction between
electrons explicitly into account. More information on diluted magnetic
semiconductors can be found in a series of five lectures I gave on the subject at the University of Regensburg.
Some details on courses I have taught in the past as well as lecture notes can be found here.
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