Vortex dynamics in layered superconductors with correlated defects: influence of interlayer coupling

Abstract

We report a detailed study of the vortex dynamics and vortex phase diagrams of two amorphous Ta_0.3Ge_0.7/Ge multilayered films with intrinsic coplanar defects, but different interlayer coupling. A pinned Bose-glass phase in the more weakly coupled sample exists only below a cross-over field H* in striking contrast to the strongly coupled film. Above H* the flux lines are thought to break up into pancake vortices and the cross-over field is significantly increased when the field is aligned along the extended defects. The two films show different vortex creep excitations in the Bose-glass phase.

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References in corpus (4)

• I-V Characteristics of High Temperature Superconductors with Columnar Defects
• Columnar defects and vortex fluctuations in layered superconductors
• Role of twin boundaries on the vortex dynamics in YBa${}_2$Cu${}_3$O${}_7$
• Bose-Glass behaviour in Bi_{2}Sr_{2}Ca_{1-x}Y_{x}Cu_{2}O_{8} crystals with columnar defects: experimental evidence for variable-range hopping

Cited by in corpus (1)

• Vortex dynamics and states of artificially layered superconducting films with correlated defects