Upper critical field in {Ba${}_{1-x}$K${}_x$BiO${}_3$}: magnetotransport versus magnetotunneling

Abstract

Elastic tunneling is used as a powerful direct tool to determine the upper critical field $H_{c2}(T)$ in the high-$T_c$ oxide Ba${}_{1-x}$K${}_x$BiO${}_3$. The temperature dependence of $H_{c2}$ 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.

4 pages incl. 5 figures

Cited by in corpus (10)

• Anisotropy of the Upper Critical Field and Critical Current in Single Crystal MgB${}_2$
• Anomalous metallic state above the upper critical field of the conventional three-dimensional superconductor AgSnSe2 with strong intrinsic disorder
• Interlayer transport in highly anisotropic misfit-layer superconductor (LaSe)1.14(NbSe2)
• Anomalous magnetic field dependence of the thermodynamic transition line in the isotropic superconductor (K,Ba)Bi03
• 3D-2D crossover in the naturally layered superconductor (LaSe)1.14(NbSe2)
• Far-infrared electrodynamics of thin superconducting NbN film in magnetic field
• Microwave Properties of Ba(0.6)K(0.4)BiO(3) Crystals
• Observation of a Transition from BCS to HTSC-like Superconductivity in Ba_{1-x}K_xBiO_3 Single Crystals
• Suppressed superconductivity in ultrathin Mo2N films due to pair-breaking at the interface
• Two-gap superconductivity in the noncentrosymmetric La${}_3$Se${}_4$ compound