Quantum oscillations in the centrosymmetric skyrmion-hosting magnetGdRu2Si2

Abstract

The skyrmion formation mechanism in centrosymmetric systems remains to be understood, partially because of the lack of fundamental understanding of the electronic structure. The authors observe de Haas--van Alphen and Shubnikov--de Haas oscillations in high magnetic fields up to 58 $T$ on GdRu${}_{2}$Si${}_{2}$, which is one of such centrosymmetric skyrmion-hosting magnets with the shortest skyrmion diameter ever found. Combined with first-principles calculations, the authors now reveal the electronic structure of GdRu${}_{2}$Si${}_{2}$ and its reconstruction at the magnetic phase boundary.