Seminar on 1 November 2018

Institute of Physics, The Czech Academy of Sciences, Praha, Czech Republic
Charge transport in normal and superconducting nanoscopic junctions
working version
at 13:00 in Seminar room F052

Combining numerical renormalization group (NRG) studies and analytical methods (unitary transformations), we investigate transport in junctions manifesting Kondo effect accompanied by other competing processes like magnetism or superconductivity. The system of magnetically tunable Kondo effect is realized in a junction comprised of a diradical molecule attached to normal leads. The corresponding double dot model is solved using NRG Ljubljana. The obtained results are compared to the experiments. Analytical studies via Schrieffer-Wolff transformation are discussed. Using Majorana transformation we obtain analytic solutions on the behavior of a quantum dot in a three-terminal set-up that includes one normal and two superconducting leads. A non-trivial relationship to asymmetric single impurity Anderson model is presented.