Insight into the electronic structure of the centrosymmetric skyrmion magnet GdRu2 Si2
Journal article, 2023
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.
Author
S. V. Eremeev
Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences
D. Glazkova
Saint Petersburg State University - Spsu
Georg Poelchen
Technische Universität Dresden
A. Kraiker
Goethe University Frankfurt
Khadiza Ali
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Artem V. Tarasov
Moscow Institute of Physics and Technology
Saint Petersburg State University - Spsu
Susanne Schulz
Technische Universität Dresden
Kristin Kliemt
Goethe University Frankfurt
E. V. Chulkov
Donostia International Physics Center
University of the Basque Country (UPV/EHU)
Saint Petersburg State University - Spsu
Spanish National Research Council (CSIC)
V. S. Stolyarov
Dukhov Research Institute of Automatics (VNIIA)
Moscow Institute of Physics and Technology
National University of Science & Technology (MISIS)
A. Ernst
Johannes Kepler University of Linz (JKU)
Cornelius Krellner
Goethe University Frankfurt
Dmitry Yu Usachov
Moscow Institute of Physics and Technology
Saint Petersburg State University - Spsu
National University of Science & Technology (MISIS)
Denis V. Vyalikh
Donostia International Physics Center
Basque Foundation for Science (Ikerbasque)
Nanoscale Advances
25160230 (eISSN)
Vol. 5 23 6678-6687Subject Categories (SSIF 2011)
Condensed Matter Physics
DOI
10.1039/d3na00435j
PubMed
38024312