2020/06/12 by Kai Chang, Stuart S. P. Parkin, S. Parkin
Chemistry · Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Chemical physics #Chemistry #Condensed matter physics #Dielectric #Ferroelectricity #Ferromagnetism #Heterojunction #MXene and MAX Phase Materials #Materials science #Monolayer #Nanotechnology #Optoelectronics #Perovskite Materials and Applications #Phosphorene #Physics #Point reflection #Spintronics #Valleytronics #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/5.0012300
published as J. Appl. Phys. 127, 220902 (2020) · A Perspective for the Special Topic on Beyond Graphene: Low Symmetry and Anisotropic 2D Materials
openalex publication_date 2020/06/12 · arxiv created 2020/06/13 · arxiv updated 2020/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Monolayer group-IV monochalcogenides (MX, M=Ge, Sn, Pb; X=S, Se, Te) are a family of novel two-dimensional (2D) materials that have atomic structures closely related to that of the staggered black phosphorus lattice. The structure of most monolayer MX materials exhibits a broken inversion symmetry and many of them exhibit ferroelectricity with a reversible in-plane electric polarization. A further consequence of the noncentrosymmetric structure is that when coupled with strong spin–orbit coupling, many MX materials are promising for the future applications in non-linear optics, photovoltaics, spintronics, and valleytronics. Nevertheless, because of the relatively large exfoliation energy, the creation of monolayer MX materials is not easy, which hinders the integration of these materials into the fast-developing field of 2D material heterostructures. In this Perspective, we review recent developments in experimental routes to the creation of the monolayer MX, including molecular beam epitaxy and two-step etching methods. Other approaches that could be used to prepare the monolayer MX are also discussed, such as liquid phase exfoliation and solution-phase synthesis. A quantitative comparison between these different methods is also presented.