Karl Franzens University Graz
Graz University of Technology
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Karl Franzens University Graz | Graz University of Technology | |
Elektronische Korrelationen: Von der Makro- zur Nanowelt Taking the opera ball as an example, the concept of correlations is illustrated and related to two fundamental phenomena of solid state physics: superconductivity and magnetism. With the merger of the local density approximation (LDA) and dynamical mean field theory (DMFT) we achieved a breakthrough to calculate materials with strong electronic correlations such as transition metal oxides and heavy fermion systems. This led to some unexpected results, such as kinks which turned out to be generic for strongly correlated systems, and the filling of the Mott-Hubbard gap, a theoretical prediction, which later was experimentally verified. An important aspect of strongly correlated electron systems is also their unusual response behavior which can result in a colossal magnetoresistance and a larger thermopower which is relevant for thermoelectric applications which transform waste heat (gradients) into electrical power. |