Physics – Condensed Matter – Superconductivity
Scientific paper
2010-03-16
Phys. Rev. Lett. 104 (2010) 117002
Physics
Condensed Matter
Superconductivity
4 pages, 3 figures, Phys. Rev. Lett. (2010) in press
Scientific paper
10.1103/PhysRevLett.104.117002
We predict anomalous atomic-scale 0-pi transitions in a Josephson junction with a ferromagnetic-insulator (FI) barrier. The ground state of such junction alternates between 0- and pi-states when thickness of FI is increasing by a single atomic layer. We find that the mechanism of the 0-pi transition can be attributed to thickness-dependent phase-shifts between the wave numbers of electrons and holes in FI. 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.
Asano Yasuhiro
Golubov Alexander A.
Kashiwaya Satoshi
Kawabata Shiro
Tanaka Yukio
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