Topological magnetic order and superconductivity in EuRbFe4As4

Hemmida M, Winterhalter-Stocker N, Ehlers D, Von Nidda HAK, Yao M, Bannies J, Rienks EDL, Kurleto R, Felser C, Buechner B, Fink J, Gorol S, Foerster T, Arsenijevic S, Fritsch , Gegenwart P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Physical Review B American Physical Society

Book Volume: 103

Article Number: 195112

Journal Issue: 19

DOI: 10.1103/PhysRevB.103.195112

Abstract

We study single crystals of the magnetic superconductor EuRbFe4As4 by magnetization, electron spin resonance (ESR), angle-resolved photoemission spectroscopy, and electrical resistance in pulsed magnetic fields up to 63 T. The superconducting state below 36.5 K is almost isotropic and is only weakly affected by the development of Eu2+ magnetic order at 15 K. On the other hand, for the external magnetic field applied along the c axis the temperature dependence of the ESR linewidth reveals a Berezinskii-Kosterlitz-Thouless topological transition below 15 K. This indicates that Eu2+ planes are a good realization of a two-dimensional XY magnet, which reflects the decoupling of the Eu2+ magnetic moments from superconducting FeAs layers.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Universität Augsburg DE Germany (DE) Helmholtz-Zentrum Dresden-Rossendorf (HZDR) DE Germany (DE)

How to cite

APA:

Hemmida, M., Winterhalter-Stocker, N., Ehlers, D., Von Nidda, H.-A.K., Yao, M., Bannies, J.,... Gegenwart, P. (2021). Topological magnetic order and superconductivity in EuRbFe4As4. Physical Review B, 103(19). https://doi.org/10.1103/PhysRevB.103.195112

MLA:

Hemmida, M., et al. "Topological magnetic order and superconductivity in EuRbFe4As4." Physical Review B 103.19 (2021).

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