Upper critical field in Ba1 - xKxBiO3: Magnetotransport vs. magnetotunneling
Abstract
Elastic tunneling is used as a powerful direct tool to determine the upper critical field Hc2(T) in the high-Tc oxide Ba1 - xKxBiO3. The temperature dependence of Hc2 inferred from the tunneling follows the Werthamer-Helfand-Hohenberg prediction for type-II superconductors. A comparison will be made with resistively determined critical-field data.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- January 1998
- DOI:
- 10.1209/epl/i1998-00132-1
- arXiv:
- arXiv:cond-mat/0103183
- Bibcode:
- 1998EL.....41..207S
- Keywords:
-
- 74.60.Ec;
- 74.25.Dw;
- 74.50.+r;
- Superconductivity phase diagrams;
- Tunneling phenomena;
- point contacts weak links Josephson effects;
- Condensed Matter - Superconductivity
- E-Print:
- 4 pages incl. 5 figures