Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu₃Co₂SbO₆.

ABSTRACT: Two-dimensional honeycomb antiferromagnets are promising materials class for realizing Kitaev quantum spin liquids. The signature of these materials includes anisotropic bond-dependent magnetic responses and persistent fluctuations in paramagnetic regime. Here, we propose Cu₃Co₂SbO₆ heterostructures as an intriguing candidate, wherein bond-dependent and frustrated spins interact with optical excitons. First-principles spin Hamiltonian calculations and in-plane anisotropic critical fields suggest strong frustration and dominant Kitaev exchange interactions. Optical spectroscopy reveals exciton coupled to frustrated magnetism, enabling optical detection of spin states. Spin-exciton coupling displays anisotropic responses to light polarization along the bond-p

SUBMITTER: Kang B 

PROVIDER: S-EPMC11790860 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature