Classical Spin Liquid or Extended Critical Range in h-YMnO3?

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  • Sofie Janas
  • Jakob Lass
  • Ana-Elena Tutueanu
  • Morten L. Haubro
  • Christof Niedermayer
  • Uwe Stuhr
  • Guangyong Xu
  • Dharmalingam Prabhakaran
  • Pascale P. Deen
  • fvh927, fvh927
  • Lefmann, Kim

Neutron spectroscopy on the classical triangular-lattice frustrated antiferromagnet h-YMnO3 reveals diffuse, gapless magnetic excitations present both far below and above the ordering temperature. The correlation length of the excitations increases as the temperature approaches zero, bearing a strong resemblance to critical scattering. We model the dynamics in the ordered and correlated disordered phase as critical spin correlations in a two-dimensional magnetic state. We propose that our findings may provide a general framework to understand features often attributed to classical spin liquids.

Original languageEnglish
Article number107203
JournalPhysical Review Letters
Volume126
Issue number10
Number of pages6
ISSN0031-9007
DOIs
Publication statusPublished - 11 Mar 2021

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