Theoretical study on the magnetic properties of the superconductor FeSe


Identifying the form of superconducting order parameter is still a controversial problem for the iron-based superconductor FeSe. Based on anisotropic two-component Ginzburg–Landau theory, we study the temperature dependence of upper critical field and London penetration depth for FeSe. Without including the spin paramagnetic effect, all of our theoretical calculations fit the experimental data well in a broad temperature range. Our results thus show that FeSe is a two-gap s-wave superconductor. And the anisotropy of effective masses in the band with larger (or smaller) gap can be estimated as about 10 (or 2) respectively.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The article in its current form has all the information needed to reproduce the presented results. There is no extra information or data that has been omitted.]


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Author information




Both authors developed the theoretical formalism, performed the analytic calculations and the numerical simulations. Both of them have read and approved the final manuscript.

Corresponding author

Correspondence to Hai Huang.

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Zhang, MK., Huang, H. Theoretical study on the magnetic properties of the superconductor FeSe. Eur. Phys. J. B 94, 57 (2021).

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