Fermi surface nesting driving the RKKY interaction in the centrosymmetric skyrmion magnet Gd2PdSi3

DOI: 10.1103/PhysRevLett.133.016401

Authors: Yuyang Dong (The University of Tokyo) , Yosuke Arai (University of Tokyo) , Kenta Kuroda (The University of Tokyo; Hiroshima University) , Masayuki Ochi (Osaka University) , Natsumi Tanaka (Tokyo Metropolitan University) , Yuxuan Wan (The University of Tokyo) , Matthew D. Watson (Diamond Light Source) , Timur K. Kim (Diamond Light Source) , Cephise Cacho (Diamond Light Source) , Makoto Hashimoto (Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory) , Donghui Lu (Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory) , Yuji Aoki (Tokyo Metropolitan University) , Tatsuma D. Matsuda (Tokyo Metropolitan University) , Takeshi Kondo (The University of Tokyo)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 133

State: Published (Approved)
Published: July 2024
Diamond Proposal Number(s): 30646 , 28930 , 25416

Abstract: The magnetic skyrmions generated in a centrosymmetric crystal were recently first discovered in Gd2⁢PdSi3. In light of this, we observe the electronic structure by angle-resolved photoemission spectroscopy and unveil its direct relationship with the magnetism in this compound. The Fermi surface and band dispersions are demonstrated to have a good agreement with the density functional theory calculations carried out with careful consideration of the crystal superstructure. Most importantly, we find that the three-dimensional Fermi surface has extended nesting which matches well the 𝒒 vector of the magnetic order detected by recent scattering measurements. The consistency we find among angle-resolved photoemission spectroscopy, density functional theory, and the scattering measurements suggests the Ruderman-Kittel-Kasuya-Yosida interaction involving itinerant electrons to be the formation mechanism of skyrmions in Gd2⁢PdSi3.

Diamond Keywords: Skyrmions

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Added On: 03/07/2024 13:54

Discipline Tags:

Quantum Materials Physics Hard condensed matter - structures Magnetism Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)