Physics – Condensed Matter – Superconductivity
Scientific paper
2000-04-17
Physics
Condensed Matter
Superconductivity
final version, section on interface Hall currents in type-I MIS structure added; 12 pages, 3 figures, LaTeX; intended as contr
Scientific paper
A novel experiment for determination of the charge related to vortices in thin superconducting film is proposed and a number of related experimental set-ups are also theoretically considered. The methods are based on the Torricelli-Bernoulli effect in superconductors and the phenomenology of the effect is briefly discussed. The vortex charge is expressed via the effective mass of the Cooper pairs, thus both parameters, inaccessible by now, could be simultaneously determined. The experiment would require layered metal-insulator-superconductor structures and standard electronics employed in kinetic measurements. The quality of the insulator-superconductor interface should be high enough as to allow for observation of electric field effects similar to those investigated in superconducting field-effect transistors. The development of layer-by-layer growth technology of oxide superconductors provides unique possibility for investigation of new fundamental effects in these materials. In particular, the structures necessary for determination of the vortex charge could be used to study the superconducting surface Hall effect, Bernoulli effect, the superfluid density, etc.. In conclusion, the systematic investigation of new effects in oxide superconductors is envisaged as an important part of the material science underlying the oxide electronics.
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