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

Дата и время публикации : 1997-05-22T07:13:18Z

Авторы публикации и институты :
M. J. W. Dodgson (ETH)
V. B. Geshkenbein (ETH)
H. Nordborg (ETH)
G. Blatter (ETH)

Ссылка на журнал-издание: Phys. Rev. Lett. 80 (1998) 837
Коментарии к cтатье: 4 pages. We have restructured the paper to emphasize that in the London scaling regime (appropriate for YBCO) our results are essentially exact. We have also emphasized that a major controversy over the relevance of the London model to describe VL melting has been settled by this work
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con

Краткий обзор статьи: 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.

Category: Physics