%0 Journal Article %A Rousochatzakis, Ioannis %A Kourtis, S. %A Knolle, J. %A Moessner, R. %A Perkins, Natalia B. %D 2019 %T Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality %U https://repository.lboro.ac.uk/articles/journal_contribution/Quantum_spin_liquid_at_finite_temperature_Proximate_dynamics_and_persistent_typicality/9408824 %2 https://repository.lboro.ac.uk/ndownloader/files/17026232 %K untagged %K Physical Sciences not elsewhere classified %X Quantum spin liquids are long-range entangled states of matter with emergent gauge fields and fractionalized excitations. While candidate materials, such as the Kitaev honeycomb ruthenate α-RuCl3, show magnetic order at low temperatures T , here we demonstrate numerically a dynamical crossover from magnonlike behavior at low T and frequencies ω to long-lived fractionalized fermionic quasiparticles at higher T and ω. This crossover is akin to the presence of spinon continua in quasi-1D spin chains. It is further shown to go hand in hand with persistent typicality down to very low T . This aspect, which has also been observed in the spin-1/2 kagome Heisenberg antiferromagnet, is a signature of proximate spin liquidity and emergent gauge degrees of freedom more generally, and can be the basis for the numerical study of many finite-T properties of putative spin liquids. %I Loughborough University