Possible structural transformation and enhanced magnetic fluctuations in exfoliated α-RuCl3

Boyi Zhou, Yiping Wang, Gavin B. Osterhoudt, Paula Lampen-Kelley, David Mandrus, Rui He, Kenneth S. Burch, Erik A. Henriksen

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

We present Raman spectroscopy experiments on exfoliated α-RuCl3, from tens of nm thick down to single layers. Besides unexpectedly finding this material to be air stable, in the thinnest layers we observe the appearance with decreasing temperature of a symmetry-forbidden mode in crossed polarization, along with an anomalous broadening of a mode at 164 cm−1 that is known to couple to a continuum of magnetic excitations. This may be due to an enhancement of magnetic fluctuations and evidence for a distorted honeycomb lattice in single- and bilayer samples.

Original languageEnglish
Pages (from-to)291-295
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume128
DOIs
StatePublished - May 2019

Keywords

  • A. Magnetic materials
  • C. Raman spectroscopy
  • D. Phonons

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