Field-induced bound-state condensation and spin-nematic phase in SrCu₂(BO₃)₂ revealed by neutron scattering up to 25.9 T.

ABSTRACT: In quantum magnetic materials, ordered phases induced by an applied magnetic field can be described as the Bose-Einstein condensation (BEC) of magnon excitations. In the strongly frustrated system SrCu₂(BO₃)₂, no clear magnon BEC could be observed, pointing to an alternative mechanism, but the high fields required to probe this physics have remained a barrier to detailed investigation. Here we exploit the first purpose-built high-field neutron scattering facility to measure the spin excitations of SrCu₂(BO₃)₂ up to 25.9 T and use cylinder matrix-product-states (MPS) calculations to reproduce the experimental spectra with high accuracy. Multiple unconventional features point to a condensation of S = 2 bound states into a spin

SUBMITTER: Fogh E 

PROVIDER: S-EPMC10781965 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature