Visualization of Current-Driven Vortex Formation in High-T_c Cuprate Superconductors

2025/11/25 by Shunsuke Nishimura, Nishimura, Shunsuke, Takeyuki Tsuji +9 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #Rare-earth and actinide compounds

paper · pdf · doi:10.48550/arxiv.2511.19896

Abstract

Type-II superconductors exhibit hysteretic behavior due to the presence of quantum vortices, and the order in which temperature and external field are varied plays a decisive role. Here we take current, rather than magnetic field, as the external drive. We image the magnetic field of a high-T_c cuprate superconductor strip after cooling. We confirm that even in zero magnetic field, current-biased cooling nucleates vortices within the strip. With a small external magnetic field, the distribution is polarized opposite to the Lorentz-force direction. These behaviors follow from the self-consistent relation between current and local field in steady flux flow. Our findings show that current history is encoded as vortices. This reveals self-field effects that influence dc measurements and glassy transitions under drive.

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• Observation of individual vortex penetration in a coplanar superconducting resonator

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