A V Ustinov et al 1991 Supercond. Sci. Technol. 4 S400 doi:10.1088/0953-2048/4/1S/119
A V Ustinov, M Hartmann, R P Huebener, G Yu Logvenov and V V Ryazanov
Show affiliationsThe authors have observed experimentally the analog of the superfluid helium fountain effect in a polycrystalline YBaCuO film. In a superconductor a temperature gradient induces the counterflow of superconducting electrons and quasiparticles. The supercurrent creates a phase difference at the intra- and intergrain weak links. In the presence of a temperature gradient parallel to an electric current they have detected an asymmetry of the current-voltage characteristic. Reversing the direction of the temperature gradient also reverses the sign of the current asymmetry. They estimate the thermoelectric coefficient for the quasiparticles in the YBaCuO sample.
74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
74.50.+r Tunneling phenomena; point contacts, weak links, Josephson effects
Issue 1S (January 1991)
A V Ustinov et al 1991 Supercond. Sci. Technol. 4 S400