| Issue |
EPJ Web of Conferences
Volume 40, 2013
JEMS 2012 – Joint European Magnetic Symposia
|
|
|---|---|---|
| Article Number | 10002 | |
| Number of page(s) | 4 | |
| Section | Magnetism and superconductivity | |
| DOI | https://doi.org/10.1051/epjconf/20134010002 | |
| Published online | 14 January 2013 | |
https://doi.org/10.1051/epjconf/20134010002
Andreev reflection through a ferromagnet-quantum dot-superconductor system with intradot Coulomb correlations
Faculty of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland
a e-mail: wojrudz@amu.edu.pl
Spin-dependent tunneling through a quantum dot coupled to one ferromagnetic and one superconducting electrodes is studied in the Andreev reflection (AR) regime. Electrical conductance is calculated within the nonequilibrium Green function technique. Effects due to a competition between the Coulomb correlations on the dot and intradot spin-flip processes are considered in the linear transport regime and for different coupling strengths between the dot and the external electrodes. It is shown that when a coherent spin rotation is present on the dot, Coulomb interactions may lead to a significant enhancement of the AR tunneling current and even to the perfect AR transmission. Origin of occurrence of a variety of the multipeak structure of the linear conductance is also discussed.
© Owned by the authors, published by EDP Sciences, 2013
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