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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Thursday, 05 February 2009
(at 13:00 in room 115, Hallwachsstr. 3)
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Unusual transport phenomena in nanostructured materials

Sibylle Gemming

Theory Department
Forschungszentrum Dresden Rossendorf
  Germany  






In nanostructured materials spatial confinement effects lead to structure-dependent modifications of the bulk transport properties. In part, such modifications can be accounted for by a classical master equation approach for the transport of the different charge carrier species. The rather large quantity of parameters, which enter such an approach, can more or less easily be adjusted to the dimensional characteristics and the electronic settings of the system as well as to temperature effects. On the other hand, a microscopically more detailed and mostly parameter-free picture is obtained from a quantum-mechanical treatment on the basis of the density-functional theory. An extension by a Green's function formalism allows the determination and analysis of electronic transport through contacted nanostructures. Examples will be given to demonstrate the applicability of the different approaches for dissipative and hopping transport through a regular array of nanostructures, for a mechanically triggered metal-insulator transition in nanowires, and for the enhanced conductivity at multiferroic domain walls.

Brief Bio:

Sibylle Gemming received her diploma and PhD degrees from the Technical University Munich. After postdoctoral stays at the MPI für Metallforschung in Stuttgart, the International School for Advanced Studies in Trieste, the University of California in Santa Barbara and the Technical University Dresden she got her habilitation from the Technical University Chemnitz. Since 2006 she is group leader at the Institute of Ion-Beam Physics and Material Science of the Forschungszentrum Dresden-Rossendorf and teaches undergraduate courses in theoretical physics and biophysics, materials science and computational science at the TU Chemnitz. The scientific focus of her group is on the development of multi-scale approaches for a realistic modeling of material properties under the influence of external influence factors.

Invited by G. Cuniberti (nanoSeminar)

last modified: 2018.10.24 Mi
author: webadmin