Possible new vortex matter phases in BSCCO
  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. 
Dan T. Fuchs (1), Eli Zeldov (1), Tsuyoshi Tamegai (2), Shuuichi Ooi   (2), Michael Rappaport (1), Hadas Shtrikman(1) ((1) W...