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TT: Fachverband Tiefe Temperaturen

TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session

TT 33.36: Poster

Mittwoch, 28. März 2012, 15:00–19:00, Poster B

Correlated heterostructures with dynamical mean field theory — •Christoph Schütte and Achim Rosch — Institut für theoretische Physik, Universität zu Köln, Germany.

The interfaces between different materials in three-dimensional nanostructures give rise to interesting electronic phenomena such as metallic or even superconducting layers between insulators. We calculate various transport coefficients for different heterostructures as a function of temperature. The interactions in the structure may be described by the Hubbard model with an additional self-consistent treatment of long-range Coulomb interactions in a Hartree approximation. Inhomogeneous Dynamical Mean Field Theory (DMFT) is employed to calculate the electronic structure of such a multilayered device in three spatial dimensions. The subsequent single impurity Anderson model (SIAM) is solved with the numerical renormalisation group (NRG), a non-perturbative method which yields the accurate low-temperature properties.