Journal
PHYSICAL REVIEW B
Volume 79, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.212503
Keywords
bismuth compounds; calcium compounds; flux flow; high-temperature superconductors; Josephson effect; strontium compounds
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We report the systematic investigations of the oscillation of the Josephson vortex (JV) flow resistance in Bi2Sr2CaCu2O8+delta microfabricated junctions with various geometries and superconducting anisotropy parameters. As the applied magnetic field parallel to the ab plane is increased, oscillation with a period corresponding to a half flux quantum par atomic Josephson junction changes to oscillation with a doubled period. This crossover is scaled by both the junction length and the anisotropy parameter indicating that the bulk inductive coupling that favors the triangular JV lattice is replaced with the surface deformation energy as the dominant interaction for a JV lattice. These results suggest that the in-phase square JV lattice is pronounced at a higher magnetic field in a smaller and more anisotropic sample.
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