Angular dependence of the melting of the porous vortex matter in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8}}$

Details Angular dependence of the melting of the porous vortex matter in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8}}$ Angular dependence of the melting of the porous vortex matter in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8}}$

2006-12-26

arxiv.org/abs/cond-mat/0612625v2

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, submitted to Physical Review Letters

Scientific paper

The behavior of vortex matter in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8}}$ in the presence of a low concentration of tilted columnar defects (CDs) was studied using magneto-optical measurements and molecular dynamics simulations. We find that while the dynamic properties are significantly affected by tilting the field away from CDs, the thermodynamic lines are angle independent. Our simulations reveal that vortex pancakes remain localized along CDs even at large tilting angles thus preserving the thermodynamic features, while suppression of irreversible properties is caused by vortex kink sliding.

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