Charge transport through ferromagnet/two-dimensionalelectron gas/d-wave superconductor junctions with Rashbaspin-orbit coupling |
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Authors: | Z.-Y. Zhang |
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Affiliation: | (1) Department of Physics, Nanjing University, Nanjing, 210093, P.R. China |
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Abstract: | Along the lines of Blonder, Tinkham and Klapwijk, we investigate the charge transport through ferromagnet/two-dimensional electronic gas/d-wave superconductor (F/2DEG/S) junctions in the presence of Rashba spin-orbit (SO) coupling and focus our attention on the interplay between spin polarization and spin precession. At zero spin polarization, the spin-mixing scattering resulted from Rashba SO coupling decreases the zero-bias conductance peak. Under spin polarization, spin precession introduces novel Andreev reflection, which competes with the effect of spin-mixing scattering. If the F layer is a half metal, the later effect is overwhelmed by that of novel Andreev reflection. As a result, the zero-bias conductance dip caused by spin polarization is enhanced, and at strong Rashba SO coupling, a split zero-bias peak is found in the gap. In an intermediate region where the two effects are comparable with each other, the zero-bias conductance shows a reentrant behavior as a function of Rashba SO coupling. |
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Keywords: | KeywordHeading" >PACS. 73.23.-b Electronic transport in mesoscopic systems 74.45.+c Proximity effects Andreev effect SN and SNS junctions 74.50.+r Tunneling phenomena point contacts, weak links, Josephson effects 74.20.Rp Pairing symmetries |
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