Recently, exotic ordered states and quasiparticles not known in convenrional magnetic materials have attracted attention in condensed-matter physics. Previously, we discovered in the magnetic semiconductor YbCuS2, in which ytterbium (Yb) atoms form a zigzag chain, an incommensurate magnetic order and charge-neutral quasiparticles. To explain these phenomena, a new theoretical framework—the anisotropic quantum spin zigzag chain model—was proposed, leading to several predictions.
In the present study, we performed copper (Cu) nuclear quadrupole resonance (NQR) measurements on YbCuS2 under high pressure. The results revealed a pressure-induced evolution of the ground state consistent with the predictions of the theoretical model. The high-pressure magnetic ordered state was identified as a special type of order known as odd-parity magnetic multipole order. Furthermore, we found that the charge-neutral quasiparticles previously discovered can be controlled by applying pressure.
The results of this study have been published in the Communications Materials.
Article information
F. Hori, H. Matsudaira, S. Kitagawa, K. Ishida, H. Suzuki, and T. Onimaru
“Pressure evolution of magnetic structure and quasiparticle excitations in anisotropic frustrated zigzag chains”
Commun. Mater. 6, 170 (2025); arXiv:2412.17575.
Kyoto University Research Information Repository, Kyoto University Press Release, NIKKEI
Reference
Pressure evolution of magnetic structure and quasiparticle excitations in anisotropic frustrated zigzag chains Journal Article
In: Communications Materials, vol. 6, pp. 170, 2025.
