Insight into the electronic structure of the centrosymmetric skyrmion magnet GdRu 2 Si 2 .

Autor:	Eremeev SV; Institute of Strength Physics and Materials Science, Russian Academy of Sciences 634055 Tomsk Russia eremeev@ispms.tsc.ru., Glazkova D; St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia., Poelchen G; Institut für Festkörper- und Materialphysik, Technische Universität Dresden D-01062 Dresden Germany., Kraiker A; Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany., Ali K; Department of Microtechnology and Nanoscience, Chalmers University of Technology Göteborg 41296 Sweden., Tarasov AV; St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia.; Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia., Schulz S; Institut für Festkörper- und Materialphysik, Technische Universität Dresden D-01062 Dresden Germany., Kliemt K; Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany., Chulkov EV; St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia.; Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Facultad de Ciencias Químicas, Universidad del País Vasco UPV/EHU 20080 San Sebastián/Donostia Spain.; Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU 20018 San Sebastián/Donostia Spain.; Donostia International Physics Center (DIPC) 20018 Donostia-San Sebastián Spain denis.vyalikh@dipc.org., Stolyarov VS; Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia.; Dukhov Research Institute of Automatics (VNIIA) Moscow 127055 Russia.; National University of Science and Technology MISIS Moscow 119049 Russia., Ernst A; Institute for Theoretical Physics, Johannes Kepler University Linz Austria., Krellner C; Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt Max-von-Laue Strasse 1 D-60438 Frankfurt am Main Germany., Usachov DY; St. Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia.; Moscow Institute of Physics and Technology Institute Lane 9, Dolgoprudny Russia.; National University of Science and Technology MISIS Moscow 119049 Russia., Vyalikh DV; Donostia International Physics Center (DIPC) 20018 Donostia-San Sebastián Spain denis.vyalikh@dipc.org.; IKERBASQUE, Basque Foundation for Science 48011 Bilbao Spain.
Jazyk:	angličtina
Zdroj:	Nanoscale advances [Nanoscale Adv] 2023 Oct 18; Vol. 5 (23), pp. 6678-6687. Date of Electronic Publication: 2023 Oct 18 (Print Publication: 2023).
DOI:	10.1039/d3na00435j
Abstrakt:	The discovery of a square magnetic-skyrmion lattice in GdRu 2 Si 2 , with the smallest so far found skyrmion size and without a geometrically frustrated lattice, has attracted significant attention. In this work, we present a comprehensive study of surface and bulk electronic structures of GdRu 2 Si 2 by utilizing momentum-resolved photoemission (ARPES) measurements and first-principles calculations. We show how the electronic structure evolves during the antiferromagnetic transition when a peculiar helical order of 4f magnetic moments within the Gd layers sets in. A nice agreement of the ARPES-derived electronic structure with the calculated one has allowed us to characterize the features of the Fermi surface (FS), unveil the nested region along k z at the corner of the 3D FS, and reveal their orbital compositions. Our findings suggest that the Ruderman-Kittel-Kasuya-Yosida interaction plays a decisive role in stabilizing the spiral-like order of Gd 4f moments responsible for the skyrmion physics in GdRu 2 Si 2 . Our results provide a deeper understanding of electronic and magnetic properties of this material, which is crucial for predicting and developing novel skyrmion-based systems. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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