Comparison of the superconducting pairing between the oxide superconductors Ba{sub 1{minus}x}K{sub x}BiO{sub 3} and YBa{sub 2}Cu{sub 3}O{sub 6.6} using phase-sensitive Josephson tunneling
- Laboratorium fuer Festkoerperphysik, Eidgenoessische Technische Hochschule-Hoenggerberg, CH-8093 Zuerich (Switzerland)
We compare the Josephson tunneling of a suspected d-wave superconductor, YBa{sub 2}Cu{sub 3}O{sub 6.6}, with that of another oxide superconductor Ba{sub 1{minus}x}K{sub x}BiO{sub 3}. For comparison the critical current I{sub c} vs applied field of a single-crystal Josephson junction injecting supercurrent in the [110] direction is measured for both superconductors. For the YBa{sub 2}Cu{sub 3}O{sub 6.6} single crystal ( T{sub c}=60 K), the critical current is a minimum at zero applied field, while for Ba{sub 1{minus}x}K{sub x}BiO{sub 3}, the critical current reveals a maximum at zero field. The results are consistent with a d-wave order parameter for YBa{sub 2}Cu{sub 3}O{sub 6.6}, and conventional s-wave superconductivity for Ba{sub 1{minus}x}K{sub x}BiO{sub 3}. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 450357
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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