A possible new mechanism of the critical current in superconductors
N. Ya. Fogel’Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovV. G. CherkasovaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
ABI
Аннотация
It has been discovered that the critical current Ic in thin (2ξ ≤ d < λ) vanadium films is independent of the temperature within a certain range of reduced temperatures and magnetic field intensities (magnetic field parallel to the film surface). A hypothesis is proposed for explaining this behavior of the critical current on the basis of concepts about transitions between a commensurate phase and an incommensurate one. The commensurability between the period of the vortex lattice in a film and the period of the vortex image lattice is also examined.
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