Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.117002
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Funding
- Ministry of Education, Science, Sports and Culture of Japan [19710085]
- NanoNed [7029]
- Grants-in-Aid for Scientific Research [19710085] Funding Source: KAKEN
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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 a stable pi state can be realized in junctions based on high-T-c superconductors with a La2BaCuO5 barrier.
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