Two-dimensional (2D) tin(II) monosulfide (SnS) with strong structural anisotropy has been proven to be a phosphorene analogue. However, difficulty in isolating very thin layer of SnS pose challenges in practical utilization. Here, we prepare ultrathin SnS via liquid phase exfoliation. With transmission electron microscopy, we identify the buckled structure of 2D SnS. We employ temperature dependent Raman spectroscopy to elucidate electron-phonon interactions, which reveals a linear phonon shifts. The active Raman modes of ultrathin SnS exhibit higher sensitivity to temperature than other 2D materials. Moreover, we demonstrate strong light-matter interaction in ultrathin SnS using Z-scan and ultrafast spectroscopy. Rich exciton-exciton and coherent exciton-photon interactions arising from many-particle excited effects in ultrathin SnS eventually enhances the nonlinear optical properties. Our findings highlight the prospects for the synthesis of ultrathin anisotropic SnS towards the betterment of thermoelectric and photonic devices.
@article{arxiv.1811.00209,
title = {Strong many-body interactions in ultrathin anisotropic tin (II) monosulfide},
author = {Abdus Salam Sarkar and Aamir Mushtaq and Dushyant Kushavah and Suman Kalyan Pal},
journal= {arXiv preprint arXiv:1811.00209},
year = {2020}
}
Comments
34 pages (Manuscript: 26 pages and Supplementary information: 8 pages), 10 figures including 4 figures in Supplementary information