Field-tuned quantum renormalization of spin dynamics in the honeycomb lattice Heisenberg antiferromagnet YbCl3

Author:

Sala GabrieleORCID,Stone Matthew B.ORCID,Halász Gábor B.ORCID,Lumsden Mark D.ORCID,May Andrew F.ORCID,Pajerowski Daniel M.,Ohira-Kawamura Seiko,Kaneko KojiORCID,Mazzone Daniel G.ORCID,Simutis GediminasORCID,Lass JakobORCID,Kato YasuyukiORCID,Do Seung-Hwan,Lin Jiao Y. Y.ORCID,Christianson Andrew D.ORCID

Abstract

AbstractThe basis for our understanding of quantum magnetism has been the study of elegantly simple model systems. However, even for the antiferromagnetic honeycomb lattice with isotropic spin interactions–one of the simplest model systems–a detailed understanding of quantum effects is still lacking. Here, using inelastic neutron scattering measurements of the honeycomb lattice material YbCl3, we elucidate how quantum effects renormalize the single-magnon and multimagnon excitations and how this renormalization can be tuned and ultimately driven to the classical limit by applying a magnetic field. Additionally, our work reveals that the quantum effects tuned by the magnetic field not only renormalize the magnetic excitations but also induce a distinctive sharp feature inside the multimagnon continuum. From a more general perspective, this result demonstrates that structures within magnetic continua can occur over a wide experimental parameter space and can be used as a reliable means of identifying quantum phenomena.

Funder

U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy

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