Numerical study of pi-junction using spin filtering barriers

Details Numerical study of pi-junction using spin filtering barriers Numerical study of pi-junction using spin filtering barriers

2010-05-19

arxiv.org/abs/1005.3363v1

International Journal of Modern Physics B 23 (2009) 4320-4328

Physics

Condensed Matter

Superconductivity

9 pages, 5 figures

Scientific paper

10.1142/S021797920906347X

We numerically investigate the Josephson transport through ferromagnetic insulators (FIs) by taking into account its band structure. By use of the recursive Green's function method, we found the formation of the pi junction in the case of the fully spin-polarized FI (FPFI), e.g., La$_2$BaCuO$_5$. Moreover, the 0-pi transition is induced by increasing the thickness of FPFI. On the other hand, Josephson current through the Eu chalcogenides shows the pi junction behavior in the case of the strong d-f hybridization between the conduction d and the localized f electrons of Eu. Such FI-based Josephson junctions may become a element in the architecture of future quantum information devices.

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