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

The discovery of a square magnetic-skyrmion lattice in GdRu2Si2, 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 GdRu2Si2 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 kz 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 GdRu2Si2. 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.

Glazkova, D.Saint Petersburg State University - Spsu (författare)
Poelchen, GeorgTechnische Universität Dresden (författare)
Kraiker, A.Johann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Ali, Khadiza,1989Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)khadizaa (författare)
Tarasov, Artem V.Saint Petersburg State University - Spsu,Moscow Institute of Physics and Technology (författare)
Schulz, SusanneTechnische Universität Dresden (författare)
Kliemt, KristinJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Chulkov, E. V.Donostia International Physics Center,Saint Petersburg State University - Spsu,Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU) (författare)
Stolyarov, V. S.Moscow Institute of Physics and Technology (författare)
Ernst, A.Johannes Kepler Universität Linz (JKU),Johannes Kepler University of Linz (JKU) (författare)
Krellner, CorneliusJohann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (författare)
Usachov, Dmitry YuSaint Petersburg State University - Spsu,Moscow Institute of Physics and Technology (författare)
Vyalikh, Denis V.Basque Foundation for Science (Ikerbasque),Donostia International Physics Center (författare)
Saint Petersburg State University - SpsuTechnische Universität Dresden (creator_code:org_t)

Av författaren/redakt...: Eremeev, S. V.; Glazkova, D.; Poelchen, Georg; Kraiker, A.; Ali, Khadiza, 19 ...; Tarasov, Artem V ...; visa fler...; Schulz, Susanne; Kliemt, Kristin; Chulkov, E. V.; Stolyarov, V. S.; Ernst, A.; Krellner, Cornel ...; Usachov, Dmitry ...; Vyalikh, Denis V ...; visa färre...

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