Pseudogap and Fermi arc induced by Fermi surface nesting in a centrosymmetric skyrmion magnet

HAYAMI Satoru

Department of Physics

May. 09, 2025

「電子の地図」に刻まれた伝導電子の運動量によって、スキルミオンのサイズが決まる

Joint press release (in Japanese)

Abstract
Skyrmions in noncentrosymmetric materials are believed to occur due to the Dzyaloshinskii-Moriya interaction. By contrast, the skyrmion formation mechanism in centrosymmetric materials remains elusive. Here, we reveal the intrinsic electronic structure of the centrosymmetric GdRu₂Si₂ by selectively measuring magnetic domains using angle-resolved photoemission spectroscopy (ARPES). We found robust Fermi surface (FS) nesting, consistent with the magnetic modulation q-vector detected by the previous resonant x-ray scattering measurements. The pseudogap opens at the nested FS portions, which vary for different magnetic domains. The anomalous pseudogap disconnects the FS to generate Fermi arcs with twofold symmetry. These results indicate that ……

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Article inforamation
Yuyang Dong et al. ,Pseudogap and Fermi arc induced by Fermi surface nesting in a centrosymmetric skyrmion magnet.Science 388, 624-630(2025).
DOI:10.1126/science.adj7710