Abstract
Localized high-T-c superconductivity on the surface of Na-doped WO3
Journal of Superconductivity and Novel Magnetism, Vol.13(5), pp.855-861
International Conference on Major Trends in Superconductivity in the New Millennium (KLOSTERS, SWITZERLAND, 31/Mar/2000 - 31/Mar/2000)
Oct/2000
Abstract
WO3 crystals were doped with Na on the surface to similar to7% nominal atomic concentration. Scanning tunneling microscopy and spectroscopy were employed, together with magnetization measurements, in the study of these crystals. Tunneling experiments reveal superconducting islands, 20-150 nm in size, covering about 10% of the surface, the rest of which is insulating. Magnetization measurements show that the superconducting phase formed at the surface has a critical temperature of 91 K, while tunneling spectroscopy yields superconducting gaps having values up to 2 Delta /kT(c) similar to 4. Presumably most of the sodium is concentrated in these islands and therefore they are metallic in nature, above 30% in atomic concentration. This material is therefore a noncuprate superconductor with a high critical temperature.
Details
- Title
- Localized high-T-c superconductivity on the surface of Na-doped WO3
- Creators
- Shimon Reich (null) - The Weizmann Institute of ScienceGregory Leitus (null) - 972WIS_INST___100Y Tssaba (null)Yafa Levi (null) - The Weizmann Institute of ScienceA Sharoni (null)O Millo (null)
- Resource Type
- Abstract
- Publication Details
- Journal of Superconductivity and Novel Magnetism, Vol.13(5), pp.855-861; Oct/2000
- Number of pages
- 7
- Language
- English
- DOI
- https://doi.org/10.1023/A:1007867710512
- Conference
- International Conference on Major Trends in Superconductivity in the New Millennium (KLOSTERS, SWITZERLAND, 31/Mar/2000 - 31/Mar/2000)
- Record Identifier
- 993266536403596
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