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Theory of quantum transport in Josephson junctions with a ferromagnetic insulator | | Shiro Kawabata
; Yasuhiro Asano
; | | Date: |
28 Sep 2010 | | Abstract: | We investigate the Josephson transport through ferromagnetic insulators (FIs)
by taking into account the band structure of FIs explicitly. Using the
recursive Green’s function method, we found the formation of a pi-junction in
such systems. Moreover the atomic-scale 0-pi oscillation is induced by
increasing the thickness of FI and its oscillation period is universal, i.e.,
just single atomic layer. Based on these results, we show that stable pi-state
can be realized in junctions based on high-Tc superconductors with
La$_2$BaCuO$_5$ barrier. Such FI-based Josephson junctions may become an
element in the architecture of future quantum computers. | | Source: | arXiv, 1009.5451 | | Services: | Forum | Review | PDF | Favorites | |
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