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arXiv · 1511.02645

Observation of anisotropic interlayer Raman modes in few-layer ReS2

Philipp Nagler·Gerd Plechinger·Christian Schüller·Tobias Korn
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Abstract

ReS$_2$ has recently emerged as a new member in the rapidly growing family of two-dimensional materials. Unlike MoS$_2$ or WSe$_2$, the optical and electrical properties of ReS$_2$ are not isotropic due to the reduced symmetry of the crystal. Here, we present layer-dependent Raman measurements of ReS$_2$ samples ranging from monolayers to ten layers in the ultralow frequency regime. We observe layer breathing and shear modes which allow for easy assignment of the number of layers. Polarization-dependent measurements give further insight into the crystal structure and reveal an energetic shift of the shear mode which stems from the in-plane anisotropy of the shear modulus in this material.

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Philipp Nagler, Gerd Plechinger, Christian Schüller, Tobias Korn. 2015-11-09. Observation of anisotropic interlayer Raman modes in few-layer ReS2. https://doi.org/10.1002/pssr.201510412

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