Observing the Suppression of Superconductivity in RbEuFe4As4 by Correlated Magnetic Fluctuations

D. Collomb; S. J. Bending; A. E. Koshelev; M. P. Smylie; L. Farrar; J.-K. Bao; D. Y. Chung; M. G. Kanatzidis; W.-K. Kwok; U. Welp

doi:10.1103/PhysRevLett.126.157001

Observing the Suppression of Superconductivity in RbEuFe4As4 by Correlated Magnetic Fluctuations

D. Collomb, S. J. Bending, A. E. Koshelev, M. P. Smylie, L. Farrar, J.-K. Bao, D. Y. Chung, M. G. Kanatzidis, W.-K. Kwok, U. Welp

DOI 10.1103/PhysRevLett.126.157001 · Physical Review Letters

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Abstract

In this Letter, we describe quantitative magnetic imaging of superconducting vortices in RbEuFe4As4 in order to investigate the unique interplay between the magnetic and superconducting sublattices. Our scanning Hall microscopy data reveal a pronounced suppression of the superfluid density near the magnetic ordering temperature in good qualitative agreement with a recently developed model describing the suppression of superconductivity by correlated magnetic fluctuations. These results indicate a pronounced exchange interaction between the superconducting and magnetic subsystems in RbEuFe4As4, with important implications for future investigations of physical phenomena arising from the interplay between them.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
RbEuFe4As4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure unresolved	onset
RbEuFe4As4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure unresolved	onset