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DF: Fachverband Dielektrische Festkörper

DF 14: Thermoelectric and Spincaloric Transport in Nanostructures

DF 14.2: Invited Talk

Wednesday, March 13, 2013, 10:00–10:30, H1

Binary oxide structures as model systems for thermoelectric transport — •Peter J. Klar and Christian Heiliger — I. Physikalisches Institut, Justus-Liebig-Universität

The binary oxides ZnO or the different phases of the Cu-O system can be considered to a large extent as semiconductors and can be fabricated by various techniques ranging from rf-sputtering to molecular beam epitaxy. Controlled doping to vary the free carrier concentration as well as alloying are feasible in the usual way. Standard semiconductor technologies can be employed to fabricate nano and microstructures. Thus, different morphologies can be achieved even for bulk material and micro and nanostructures can be prepared in a controlled way. A thorough understanding of the bulk thermoelectric properties of these oxides forms the basis of studying the various types of nano and microstructured samples. To obtain an understanding of the influence of grain boundaries, interfaces, and phase segregation on the thermoelectric transport, local and global properties need to be studied by experiment and to be analyzed by multi-scale theoretical models. Several examples of our approach will be presented.