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arXiv · 2109.08700

Bridge in micron-sized Bi2Sr2CaCu2O8+y sample act as converging lens for vortices

Joaquín Puig·Néstor René Cejas Bolecek·Jazmín Aragón Sánchez·Moira Inés Dolz·Marcin Konczykowski·Yanina Fasano
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Abstract

We report on direct imaging of vortex matter nucleated in micron-sized Bi2Sr2CaCu2O8+y superconducting samples that incidentally present a bridge structure. We find that when nucleating vortices in a field-cooling condition the deck of the bridge acts as a converging lens for vortices. By means of Bitter decoration images allowing us to quantify the enhancement of vortex-vortex interaction energy per unit length in the deck of the bridge, we are able to estimate that the deck is thinner than 0.6\,$\mu$m. We show that the structural properties of vortex matter nucleated in micron-sized thin samples are not significantly affected by sample-thickness variations of the order of half a micron, an important information for type-II superconductors-based mesoscopic technological devices.

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Joaquín Puig, Néstor René Cejas Bolecek, Jazmín Aragón Sánchez, Moira Inés Dolz, Marcin Konczykowski, Yanina Fasano. 2021-09-17. Bridge in micron-sized Bi2Sr2CaCu2O8+y sample act as converging lens for vortices. https://doi.org/10.1016/j.physc.2021.1353948

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