Berlin 2015 – wissenschaftliches Programm
TT 71.80: Poster
Mittwoch, 18. März 2015, 15:00–18:00, Poster B
Spin-orbit coupling and its influence on the competing orders in the functional renormalization group method — •Mario Fink, Christian Platt, Werner Hanke, and Ronny Thomale — Institut für Theoretische Physik und Astrophysik Fakultät für Physik und Astronomie Am Hubland D - 97074 Würzburg, Germany
The effect of spin-orbit coupling plays an essential role in current research on topological insulators and topological superconductivity. To investigate the influence of spin-orbit coupling on the competing orders of quantum many-body systems, the functional renormalization group (FRG) seems to be one method of choice. We present an extended FRG method, which incorporates a spin-dependent formulation of the FRG flow equations. The unconventional superconductor Sr2RuO4 is considered one candidate system which exhibits an intricate interplay between spin-orbit interactions and competing many-body instabilities. In this context, our method is capable of testifying e.g. the symmetry and the origin of the superconducting gap on the α, β, and γ bands.