Lamellar Solid-Liquid Mesophase Nucleated by Josephson Vortices at the Melting of the Vortex Lattice in Bi2Sr2CaCu2O8+δ Superconductor

Y. Segev; Y. Myasoedov; E. Zeldov; T. Tamegai; G. P. Mikitik; E. H. Brandt

doi:10.1103/PhysRevLett.107.247001

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Lamellar Solid-Liquid Mesophase Nucleated by Josephson Vortices at the Melting of the Vortex Lattice in Bi2Sr2CaCu2O8+δ Superconductor

Y. Segev, Y. Myasoedov, E. Zeldov, T. Tamegai, G. P. Mikitik, E. H. Brandt

DOI 10.1103/PhysRevLett.107.247001 · Physical Review Letters

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Abstract

The local effect of the Josephson vortices on the vortex lattice melting process in Bi2Sr2CaCu2O8+δ crystals in the presence of an in-plane field Hab is studied by differential magneto-optical imaging. The melting process is found to commence along the Josephson vortex stacks, forming a mesomorphic phase of periodic liquid and solid lamellas, the direction and spacing of which are controlled by Hab. The reduction of the local melting field Hm along the Josephson vortex stacks is more than an order of magnitude larger than the reduction of the average bulk Hm by Hab.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown