Anisotropy of Vortex-Liquid and Vortex-Solid Phases in Single Crystals of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$: Violation of the Scaling Law

Abstract

The vortex-liquid and vortex-solid phases in single crystals of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ placed in tilted magnetic fields are studied by in-plane resistivity measurements using the Corbino geometry to avoid spurious surface barrier effects. It was found that the anisotropy of the vortex-solid phase increases with temperature and exhibits a maximum at $T\approx 0.97T_c$. In contrast, the anisotropy of the vortex-liquid rises monotonically across the whole measured temperature range. The observed behavior is discussed in the context of dimensional crossover and thermal fluctuations of vortices in the strongly layered system.

4 pages, 3 figures, submitted to Phys. Rev. Lett

References in corpus (1)

• The London theory of the crossing-vortex lattice in highly anisotropic layered superconductors

Cited by in corpus (3)

• Composite to tilted vortex lattice transition in $B{i}_{2}S{r}_{2}CaC{u}_2{O}_{8+\delta }$ in oblique fields
• Attractive interaction between superconducting vortices in tilted magnetic fields
• Scaling behavior of the crossover to short-stack regimes of Josephson vortex lattices in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ stacks