期刊
PHYSICAL REVIEW B
卷 100, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.100.045117
关键词
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资金
- Deutsche Forschungsgemeinschaft [SFB 1143]
- Boston University Center for Non-Equilibrium Systems and Computation
- US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0018056]
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 alpha-RuCl3, show magnetic order at low temperatures T, here we demonstrate numerically a dynamical crossover from magnonlike behavior at low T and frequencies omega to long-lived fractionalized fermionic quasiparticles at higher T and omega. 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.
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