Possible new vortex matter phases in BSCCO
Dan T. Fuchs (1), Eli Zeldov (1), Tsuyoshi Tamegai (2), Shuuichi Ooi, (2), Michael Rappaport (1), Hadas Shtrikman(1) ((1) Weizmann Institute of, Science, (2) Tokyo University)
TL;DR
This paper investigates the vortex matter phase diagram in BSCCO crystals, revealing a potential new ordered vortex phase above the first-order transition and detailing the surface barrier's role in phase identification.
Contribution
It introduces a novel method analyzing vortex penetration and surface barriers to identify new vortex phases in BSCCO, expanding understanding of vortex matter.
Findings
Identification of a possible new vortex phase above the first-order transition.
Subdivision of the solid phase into two distinct phases.
Sensitive determination of the depinning temperature.
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.
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