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

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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.
Original languageEnglish
Article number157001
Number of pages7
JournalPhysical Review Letters
Volume126
Issue number15
Early online date14 Apr 2021
DOIs
Publication statusPublished - 14 Apr 2021

Bibliographical note

Funding Information:
We acknowledge support from the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division for the crystal growth, theoretical modeling, and magnetotransport measurements. Financial support was also provided by the Engineering and Physical Sciences Research Council (EPSRC) in the UK under Grant No. EP/R007160/1 and the Nanocohybri COST Action CA-16218. D. C. acknowledges financial support from the Lloyds Register Foundation ICON (Grant No. G0086) and L. F. from the EPSRC Centre for Doctoral Training in Condensed Matter Physics, Grant No. EP/L015544/1. J.-K. Bao acknowledges the Alexander von Humboldt Foundation for financial support in Germany.

ASJC Scopus subject areas

  • General Physics and Astronomy

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