Bosonic spinons in anisotropic triangular antiferromagnets

Youngsu Choi, Suheon Lee, Je-Ho Lee, Seungyeol Lee, Maeng-Je Seong () and Kwang-Yong Choi ()
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Youngsu Choi: Chung-Ang University
Suheon Lee: Chung-Ang University
Je-Ho Lee: Chung-Ang University
Seungyeol Lee: Chung-Ang University
Maeng-Je Seong: Chung-Ang University
Kwang-Yong Choi: Chung-Ang University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Anisotropic triangular antiferromagnets can host two primary spin excitations, namely, spinons and triplons. Here, we utilize polarization-resolved Raman spectroscopy to assess the statistics and dynamics of spinons in Ca3ReO5Cl2. We observe a magnetic Raman continuum consisting of one- and two-pair spinon-antispinon excitations as well as triplon excitations. The twofold rotational symmetry of the spinon and triplon excitations are distinct from magnons. The strong thermal evolution of spinon scattering is compatible with the bosonic spinon scenario. The quasilinear spinon hardening with decreasing temperature is envisaged as the ordering of one-dimensional topological defects. This discovery will enable a fundamental understanding of novel phenomena induced by lowering spatial dimensionality in quantum spin systems.

Date: 2021
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DOI: 10.1038/s41467-021-26716-8

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