Vortex nanoliquid in high-temperature superconductors

A low density columnar defects (CD) to perturb the vortex liquid for the formation of an intermediate nanoliquid phase was discussed. For visualising the flow of transport current, the evidence of delocalization line was revealed within the reversible vortex region by using a differential magneto-optical technique. The CD's were created using low irradiation doses of 1 GeV Pb ions. It was found that the nanoliquid phase displayed a high correlation along the columnar defects but no transverse critical currents.