Correlation between d-wave pairing behavior and magnetic-field-dependent zero-bias conductance peak
- Electromagnetic Technology Division, NIST, Boulder, Colorado 80303 (United States)
- University of Maryland, College Park, Maryland 20742 (United States)
- DuPont Central Research and Development, Wilmington, Delaware 19880-0304 (United States)
- Superconductor Technologies, Inc., Santa Barbara, California 93111-2310 (United States)
- Naval Research Laboratory, Washington, DC 20375 (United States)
We consistently observe a magnetic-field-dependent conductance peak at zero-bias voltage in a wide range of superconductor/noble-metal junctions fabricated from oxide superconductors (YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} and Tl{sub 2}Ba{sub 2}CaCu{sub 2}O) that have been reported to exhibit d-wave pairing behavior; however, no measurable peak appears in similar junctions made from an s-wave oxide superconductor (Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4}). Explanations of this correlation are considered in terms of the Appelbaum-Anderson model for magnetic interface scattering and the midgap-state model for d-wave interface states. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 550510
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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