24.10.2017 16:00, Raum: S-288
Prof. Dr. Stefan Kirchner (Center for Correlated Matter, Zhejiang, University, Hangzhou, China)
Transport anomalies in ZrAs1.58Se0.39: Vacancies in the PbFCl structure as a route to two-channel Kondo physics
14.11.2017 16:00, Raum: S-288
Dr. Martin Hohenadler (Universität Würzburg)
Competing Orders in Luttinger and Dirac Liquids
28.11.2017 17:00, Raum: S-288
Prof. Dr. Björn Trauzettel (Universität Würzburg)
Chiral anomaly and fractional charges at the quantum spin Hall edge
12.12.2017 16:00, Raum: S-288
Eugene Kogan (Bar Ilan University)
Spin-anisotropic magnetic impurity in a Fermi gas: Integration of poor man's scaling equations

We consider a single magnetic impurity described by the spin-anisotropic s-d(f ) exchange (Kondo) model and formulate a scaling equation for the spin-anisotropic model when the density of states (DOS) of electrons is a power-law function of energy (measured relative to the Fermi energy).We solve this equation containing terms up to the second order in coupling constants in terms of elliptic functions. From the obtained solution we find the phases corresponding to the infinite isotropic antiferromagnetic Heisenberg exchange, to the impurity spin decoupled from the electron environment (only for the pseudogap DOS), and to the infinite Ising exchange (only for the diverging DOS). We analyze the critical surfaces, corresponding to the finite isotropic antiferromagnetic Heisenberg exchange for the pseudogap DOS.

9.1.2018 16:00, Raum: S-288
Prof. Dr. Raymond Frésard (Normandie Université, ENSICAEN, UNICAEN, CNRS, CRISMAT, Caen)
Charge excitation spectra of the two-dimensional extended Hubbard Model: collective modes and continuum
6.2.2018 16:00, Raum: S-288
Prof. Dr. Malte A. Peter (Institut für Mathematik, Angewandte Analysis, Universität Augsburg)
Localisation of classical waves in some disordered media