Work

Superconducting Order Parameter of the RbCa2Fe4As4F2 Compound

Year: 2024

Type: article

Abstract: The superconducting order parameter of the RbCa2Fe4As4F2 compound belonging to the new 12442 family of iron-based superconductors with a critical temperature of T c ~ 32 K has been studied. Two superconducting condensates with the order parameters ΔL ~ 6.3 meV and ΔS ~ 2.8 meV have been detected for the first time by multiple Andreev reflection spectroscopy. The temperature dependence of the superconducting critical current density J c(T) in the intrinsic field has been measured. The approximation of the dependence J c(T) demonstrates the correspondence of the experimental data to the double-gap model with the s-wave order parameter and the gaps of ΔL ~ 6 meV and ΔS ~ 2 meV. The superconducting order parameters obtained by two different methods are in good agreement with each other.

Source: Journal of Experimental and Theoretical Physics Letters

DOI: 10.1134/s0021364024604445

Authors: A. S. Usoltsev, A. T. Daniyarkhodzhaev, A. A. Gippius, A. V. Sadakov

Institutions: P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Russian Academy of Sciences

Language: English

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funder: Russian Science Foundation

OpenAlex ID: W4407443579