Characteristics of First-Order Vortex Lattice Melting: Jumps in Entropy and Magnetization

Details Characteristics of First-Order Vortex Lattice Melting: Jumps in Entropy and Magnetization Characteristics of First-Order Vortex Lattice Melting: Jumps in Entropy and Magnetization

1997-05-22

arxiv.org/abs/cond-mat/9705220v2

Phys. Rev. Lett. 80 (1998) 837

Physics

Condensed Matter

Superconductivity

4 pages. We have restructured the paper to emphasize that in the London scaling regime (appropriate for YBCO) our results are

Scientific paper

10.1103/PhysRevLett.80.837

We derive expressions for the jumps in entropy and magnetization characterizing the first-order melting transition of a flux line lattice. In our analysis we account for the temperature dependence of the Landau parameters and make use of the proper shape of the melting line as determined by the relative importance of electromagnetic and Josephson interactions. The results agree well with experiments on anisotropic Y$_1$Ba$_2$Cu$_3$O$_{7-\delta}$ and layered Bi$_2$Sr$_2$Ca$_1$Cu$_2$O$_8$ materials and reaffirm the validity of the London model.

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