Insight into the electronic structure of the centrosymmetric skyrmion magnet GdRu2Si2
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

Saint Petersburg State University - Spsu

Moscow Institute of Physics and Technology

Susanne Schulz

Technische Universität Dresden

Kristin Kliemt

Goethe University Frankfurt

E. V. Chulkov

Donostia International Physics Center

Saint Petersburg State University - Spsu

University of the Basque Country (UPV/EHU)

Centro Mixto CSIC-UPV/EHU

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

National University of Science & Technology (MISIS)

Saint Petersburg State University - Spsu

Moscow Institute of Physics and Technology

Denis V. Vyalikh

Basque Foundation for Science (Ikerbasque)

Donostia International Physics Center

Nanoscale Advances

25160230 (eISSN)

Vol. 5 23 6678-6687

Subject Categories

Condensed Matter Physics

DOI

10.1039/d3na00435j

PubMed

38024312

More information

Latest update

3/7/2024 9