Effect of the alignment of the superconducting nodal direction with the sample edge in the orientation of vortex nanocrystals

PUIG, J.; CEJAS BOLECEK, NÉSTOR R.; DOLZ, M.I.; ARAGÓN SÁNCHEZ, J.; PASTORIZA, H.; KONCZYKOWSKI, M.; FASANO, Y.

Bariloche

Workshop; Poster en YIELDING PHENOMENA IN DISORDERED SYSTEMS; 2019

Centro Atómico Bariloche - Instituto Balseiro

We have studied the orientation of compact planes in vortex nanocrystals with roughly 100 vortices when nucleated in micrometric cuboids of the high-Tc Bi2Sr2CaCu2O8+y superconductor. The cuboids are engineered such thatthey have their edges either parallel to the nodal or antinodal direction of the d-wave superconducting order parameter of this material. By applying magnetic decoration we obtain snapshots of the field-cooled vortex nanocrystalsnucleated at different fields and observe differences in the orientation of the vortex compact planes for both types of samples. While in antinodal cuboids a given family of compact planes is always aligned with the sample edge, innodal cuboids no family of compact planes is in register of the sample edge. We also study the interaction force between all vortices of the nanocrystal and found a larger the dispersion in the spatial distribution of this magnitudefor vortex nanocrystals nucleated in nodal cuboids. We suggest this is associated to the orientation of the vortex structure for both types of samples