$H_{3}S$ is a high-$\kappa$ superconductor with columnar pinning defects
Abstract
Recently, the existence of superconductivity in and other high-pressure hydrides is called into question, because of some flawed magnetic measurements. In Ref.[1] the SCPC model is proposed, where strong pinning of vortices is due to long columnar defects in - with lengths of the order of vortex lengths . Two relevant type of experiments in magnetic fields are explained by this model: (1) Reduction (with respect to standard superconductors) of the thermal broadening of resistance () in magnetic field , , is governed by the small parameter . The measurements give, that in there is a large shift of the irreversible line towards the line. (2) In ZFC (zero field cooled) experiments on penetration of the magnetic field () in [3], the latter reaches the center of a superconducting disk at much larger external fields, i. e. for . The later is due to the pronounced pinning of vortices, but not to the Meissner effect. The calculated - dependence of the penetrated, perpendicular and parallel , magnetic field into the sample is in satisfactory agreement with the experimental results for in [3], where . Problems related to measurements of the Meissner effect in are also discussed. The SCPC model, applied on the bulk sample, predicts, that the latter is a high- superconductor.
Keywords
Cite
@article{arxiv.2301.13153,
title = {$H_{3}S$ is a high-$\kappa$ superconductor with columnar pinning defects},
author = {Miodrag L. Kulić},
journal= {arXiv preprint arXiv:2301.13153},
year = {2023}
}
Comments
12 pages, 7 figures. Typos corrected, on p.10 "$\lambda_{0}$ too large" is replaced by "$\lambda_{0}$ too small"