Theory of proximity effect in ferromagnet/superconductor heterostructures in the presence of spin dependent interfacial phase shift

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Yoshizaki, D. and Golubov, A. and Tanaka, Y. (2012) Theory of proximity effect in ferromagnet/superconductor heterostructures in the presence of spin dependent interfacial phase shift. Japanese journal of applied physics, 51 . 010108 - . ISSN 0021-4922

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Abstract:We study the proximity effect and charge transport in ferromagnet (F)/superconductor (S) and S/F/I/F/S junctions (where I is insulator) by taking into account simultaneously exchange field in F and spin-dependent interfacial phase shifts (SDIPS) at the F/S interface. We solve the Usadel equations using extended Kupriyanov–Lukichev boundary conditions which include SDIPS, where spin-independent part of tunneling conductance GT and spin-dependent one Gφ coexist. The resulting local density of states (LDOS) in a ferromagnet depends both on the exchange energy Eex and Gφ/GT. We show that the magnitude of zero-temperature gap and the height of zero-energy LDOS have a non-monotonic dependence on Gφ/GT. We also calculate Josephson current in S/F/I/F/S junctions and show that crossover from 0-state to π
Item Type:Article
Additional information:Open access article
Copyright: © Japanese Society of Applied Physics
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/82267
Official URL:http://dx.doi.org/10.1143/JJAP.51.010108
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