Observation of low-frequency Raman peak in layered WTe₂

2023/08/10 by Nema, Hirofumi, Fujii, Yasuhiro, Oishi, Eiichi +1 · 1 citation
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)

paper · doi:10.48550/arxiv.2308.05512

Abstract

WTe₂ recently attracted considerable attention as a layered material exhibiting ferroelectricity, giant magnetoresistance, and pressure-induced superconductivity. In this study, we performed Raman spectroscopy on bulk WTe₂, including the unreported low frequency region. A novel Raman peak (P0) was found at approximately 9 cm^-1 in addition to the seven already known peaks. Furthermore, the angular and polarization dependence of the spectra revealed that the novel peak had A₁ symmetry. The existence of this novel peak is consistent with first principles calculations by another group. Our work paves the way for studying the low frequency vibration modes of atomic layer ferrolectric films.

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