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arXiv · 1110.6253

Lamellar mesophase nucleated by Josephson vortices at the melting of the vortex lattice in $Bi_2Sr_2CaCu_2O_{8+delta}$

Yehonathan Segev·Yuri Myasoedov·Eli Zeldov·Tsuyoshi Tamegai·Grigorii P. Mikitik·Ernst Helmut Brandt
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Abstract

The local effect of the Josephson vortices on the vortex lattice melting process in \BSCCO crystals in the presence of an in-plane field $H_{ab}$ 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 $H_{ab}$. The reduction of the local melting field $H_m$ along the Josephson vortex stacks is more than an order of magnitude larger than the reduction of the average bulk $H_m$ by $H_{ab}$.

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Yehonathan Segev, Yuri Myasoedov, Eli Zeldov, Tsuyoshi Tamegai, Grigorii P. Mikitik, Ernst Helmut Brandt. 2011-10-28. Lamellar mesophase nucleated by Josephson vortices at the melting of the vortex lattice in $Bi_2Sr_2CaCu_2O_{8+delta}$. https://doi.org/10.1103/physrevlett.107.247001

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