Work

Spin-flop-like transition as quantum critical point in Cs 2 RuO 4

Year: 2025

Type: article

Abstract: Cs${}_{2}$RuO${}_{4}$ expands the celebrated family of frustrated magnets Cs${}_{2}M\phantom{\rule{0}{0ex}}{X}_{4}$ ($M$=Cu, Co; $X$=Br, Cl) into the realm of 4$d$ transition metal ions. This study uncovers an unconventional spin-flop-like transition tied to a quantum critical point, hidden inside the antiferromagnetically ordered phase. Inelastic neutron scattering reveals the magnetic Hamiltonian, which shows that the origin of this peculiar transition lies in geometric frustration of single-ion anisotropy.

Source: Physical review. B./Physical review. B

DOI: 10.1103/bds5-vkvm