Anisotropic peak effect due to structural phase transition in the vortex lattice

Baruch Rosenstein, Anton Knigavko

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

It is shown that the recently observed new peak effect in YBCO could be explained by the softening of the vortex lattice due to a structural phase transition in the vortex lattice. At this transition square lattice transforms into a distorted hexagonal one. While conventional peak effect is associated with the softening of shear modes (elastic modulus c66 vanishes) at melting, in this case the relevant mode is “squash” mode (c11+c22−2c12 vanishes).

Original languageEnglish
Pages (from-to)844-847
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number4
DOIs
StatePublished - 1 Jan 1999

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