Kondo effect and spin-active scattering in ferromagnet-superconductor junctions

Soller, H. and Hofstetter, L. and Csonka, S. and Yeyati, A. L. and Schonenberger, C. and Komnik, A.. (2012) Kondo effect and spin-active scattering in ferromagnet-superconductor junctions. Physical Review B, Vol. 85 , 174512.

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Official URL: http://edoc.unibas.ch/dok/A6070308

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We study the interplay of superconducting and ferromagnetic correlations on charge transport in different geometries with a focus on both a quantum point contact as well as a quantum dot in the even and the odd state with and without spin-active scattering at the interface. In order to obtain a complete picture of the charge transport we calculate the full counting statistics in all cases and compare the results with experimental data. We show that spin-active scattering is an essential ingredient in the description of quantum point contacts. This holds also for quantum dots in an even charge state, whereas it is strongly suppressed in a typical Kondo situation. We explain this feature by the strong asymmetry of the hybridizations with the quantum dot and show how Kondo peak splitting in a magnetic field can be used for spin filtering. For the quantum dot in the even state, spin-active scattering allows for an explanation of the experimentally observed mini-gap feature.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Hofstetter, Lukas and Csonka, Szabolcs
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:01 Mar 2013 11:14
Deposited On:01 Mar 2013 11:13

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