Novel magnetic stoichiometric superconductor EuRbFe4As4

Abstract

In the novel stoichiometric iron-based material RbEuFe4As4 superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states; their coexistance is puzzling and represents a challenge for both experiment and theory. Using angle-resolved photoemission spectroscopy, resonant photoemission spectroscopy, Andreev reflection spectroscopy and scanning tunneling spectroscopy we have addressed this puzzle and unambigously shown that Fe- and Eu-derived states are largely decoupled and that superconducting and a long range magnetic orders exist almost independently from each other.

arXiv comment7 pages, 8 figures, To appear in: Phys.Usp

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• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Antiferromagnetic resonances in twinned EuFe2As2 single crystal