Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire

  title={Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire},
  author={Ryan P. Beardsley and Andrey V. Akimov and Jake D. G. Greener and Garry W. Mudd and Sathyan Sandeep and Zakhar R. Kudrynskyi and Zakhar D. Kovalyuk and Amalia Patan{\'e} and Anthony J. Kent},
  journal={Scientific Reports},
Van der Waals (vdW) layered crystals and heterostructures have attracted substantial interest for potential applications in a wide range of emerging technologies. An important, but often overlooked, consideration in the development of implementable devices is phonon transport through the structure interfaces. Here we report on the interface properties of exfoliated InSe on a sapphire substrate. We use a picosecond acoustic technique to probe the phonon resonances in the InSe vdW layered crystal… 
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