Electronic structure and coexistence of superconductivity with magnetism in RbEuFe4As4
In: ISSN: 2469-9950, 2021
Online
academicJournal
Zugriff:
International audience ; In the novel stoichiometric iron-based material RbEuFe 4 As 4 , superconductivity coexists with a peculiar longrange magnetic order of Eu 4f states. Using angle-resolved photoemission spectroscopy, we reveal a complex three-dimensional electronic structure and compare it with density functional theory calculations. Multiple superconducting gaps were measured on various sheets of the Fermi surface. High-resolution resonant photoemission spectroscopy reveals magnetic order of the Eu 4f states deep into the superconducting phase. Both the absolute values and the anisotropy of the superconducting gaps are remarkably similar to the sibling compound without Eu, indicating that Eu magnetism does not affect the pairing of electrons. A complete decoupling between Feand Eu-derived states was established from their evolution with temperature, thus unambiguously demonstrating that superconducting and a long-range magnetic orders exist independently from each other. The established electronic structure of RbEuFe 4 As 4 opens opportunities for the future studies of the highly unorthodox electron pairing and phase competition in this family of iron-based superconductors with doping.
Titel: |
Electronic structure and coexistence of superconductivity with magnetism in RbEuFe4As4
|
---|---|
Autor/in / Beteiligte Person: | Kim, T., K ; Pervakov, K., S ; Evtushinsky, D., V ; Jung, S., W ; Poelchen, G. ; Kummer, K. ; Vlasenko, V., A ; Sadakov, A., V ; Usoltsev, A., S ; Pudalov, V., M ; Roditchev, D. ; Stolyarov, V., S ; Vyalikh, D., V ; Borisov, V. ; Valentí, R. ; Ernst, A. ; Eremeev, S., V ; Chulkov, E., V ; DIAMOND Light source ; P. N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow (LPI RAS) ; Russian Academy of Sciences Moscow (RAS) ; Ecole Polytechnique Fédérale de Lausanne (EPFL) ; Technische Universität Dresden = Dresden University of Technology (TU Dresden) ; European Synchrotron Radiation Facility (ESRF) ; Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM) ; Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; Moscow Institute of Physics and Technology Moscow (MIPT) ; Ikerbasque - Basque Foundation for Science ; Goethe-Universität Frankfurt am Main ; University of Linz - Johannes Kepler Universität Linz (JKU) ; the Russian Academy of Sciences Moscow, Russia (RAS) ; Saint Petersburg State University (SPBU) |
Link: | |
Zeitschrift: | ISSN: 2469-9950, 2021 |
Veröffentlichung: | HAL CCSD ; American Physical Society, 2021 |
Medientyp: | academicJournal |
DOI: | 10.1103/physrevb.103.174517 |
Schlagwort: |
|
Sonstiges: |
|