Possible new vortex matter phases in BSCCO
arXiv:cond-mat/9804205 · doi:10.1103/PhysRevLett.80.4971
Abstract
The vortex matter phase diagram of BSCCO crystals is analyzed by investigating vortex penetration through the surface barrier in the presence of a transport current. The strength of the effective surface barrier, its nonlinearity, and asymmetry are used to identify a possible new ordered phase above the first-order transition. This technique also allows sensitive determination of the depinning temperature. The solid phase below the first-order transition is apparently subdivided into two phases by a vertical line extending from the multicritical point.
11 pages, 3 figures, accepted for publication in PRL