https://doi.org/10.1140/epjb/s10051-022-00441-7
Regular Article - Solid State and Materials
The critical current density of iron-based superconductors under magnetic field
1
Division of Physics, Faculty of Electrical and Electronics Engineering, Thuyloi University, 175 Tay Son, Dong Da, Ha Noi, Viet Nam
2
Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Ha Noi, Vietnam
Received:
5
August
2022
Accepted:
18
October
2022
Published online:
28
October
2022
The time-dependent Ginzburg–Landau Lawrence–Doniach model with thermal fluctuations is used to investigate the critical current density. We calculate the critical current as a function of magnetic field and temperature in the homogeneous phase. The theoretical result based on the self-consistent Gaussian approximation is used to fit the measurement data of iron-based superconductors FeSe
Te. Our results show good agreement with experimental data for temperatures at 4.2 and 12 K. We also plot several theoretical curves about the critical current density for temperatures below and above 
. It shows that the critical current density is still non-zero and considerably large for temperature above , indicating the residual superconductivity above due to strong thermal fluctuations.
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
