Coherent detection of hidden spin-lattice coupling in a van der Waals antiferromagnet.

ABSTRACT: Strong interactions between different degrees of freedom lead to exotic phases of matter with complex order parameters and emergent collective excitations. Conventional techniques, such as scattering and transport, probe the amplitudes of these excitations, but they are typically insensitive to phase. Therefore, novel methods with phase sensitivity are required to understand ground states with phase modulations and interactions that couple to the phase of collective modes. Here, by performing phase-resolved coherent phonon spectroscopy (CPS), we reveal a hidden spin-lattice coupling in a vdW antiferromagnet FePS₃ that eluded other phase-insensitive conventional probes, such as Raman and X-ray scattering. With comparative analysis and analytical calculations, we directly show tha

SUBMITTER: Ergecen E 

PROVIDER: S-EPMC10041062 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature