Abstract
We combine static magnetic susceptibility , muon-spin relaxation, and nuclear magnetic resonance measurements to explore the spin dynamics in the disordered-induced quantum spin liquid candidate . Inverse Laplace transform analysis of the spin-lattice relaxation rate enables us to identify two characteristic temperatures and . Below , a slower component dictated by gapped excitations with a spin gap evolves distinctly from a faster component pertaining to gapless excitations. Furthermore, we observe a sub-Curie divergent , a power-law dependent , and a weakly activated () below . All these features suggest the coexistence of a disordered spin-liquid state and spin singlets with spatially distributed gaps.
- Received 21 August 2022
- Revised 1 January 2023
- Accepted 17 January 2023
DOI:https://doi.org/10.1103/PhysRevB.107.014424
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