Andreev Reflection in Transport through a Quantum Dot Coupled to Ferromagnetic and Superconducting Electrodes
K. Bociana, W. Rudzińskia and J. Barnaśa, b
aDepartment of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
bInstitute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
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Spin-dependent tunneling through a quantum dot coupled to one ferromagnetic and one superconducting electrodes is studied theoretically in the Andreev reflection regime. Electrical conductance is calculated in terms of the nonequilibrium Green function technique. Effects due to the Zeeman splitting of the dot level are analyzed in both linear and nonlinear transport regimes, and are compared with the corresponding effects due to coherent intradot spin rotation.
DOI: 10.12693/APhysPolA.121.1201
PACS numbers: 72.25.Mk, 73.63.Kv, 73.23.Hk