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Possible Structural Transformation and Enhanced Magnetic Fluctuations in Exfoliated α-RuCl₃

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arxiv 1709.00431 v1 pith:HTEUPVEA submitted 2017-09-01 cond-mat.str-el

Possible Structural Transformation and Enhanced Magnetic Fluctuations in Exfoliated α-RuCl₃

Boyi Zhou , Yiping Wang , Gavin B. Osterhoudt , Paige Kelly , David Mandrus , Rui He , Kenneth S. Burch , Erik A. Henriksen This is my paper
classification cond-mat.str-el
keywords magneticalphaexfoliatedfluctuationslayersmoderuclalong
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We present initial Raman spectroscopy experiments on exfoliated flakes of $\alpha$-RuCl$_3$, 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 bi-layer samples.

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