Affordable Access

Publisher Website

Dimensional crossover vortex fluctuations in irreversibility line of high-quality Tl2Ba2CaCu2O8thin film

Physica C Superconductivity
Publication Date
DOI: 10.1016/s0921-4534(97)01062-9


Abstract The current-voltage (I–V) characteristics are investigated in a high quality Tl-2212 thin film in magnetic fields (up to 8 Tesla) applied perpendiculary to the layers. We find experimental support for the existence of a crossover from (3D) to (2D) vortex fluctuations occuring at magnetic field B cr. For B ⪡ B cr, the scaling behaviour of the vortex glass transition is observed with critical exponents z ≈ 3 and ν ≈ 1.9, which are field independent. At sufficiently large fields B ⪢ B cr, we show that the thereshold measurable ohmic resistance can be attributed to melting of a vortex lattice triggered by (2D) vortex fluctuations.

There are no comments yet on this publication. Be the first to share your thoughts.