Edge-state-induced magnetism in two-dimensional hematene

Abstract

Recently, monolayer hematite termed hematene (FeO2) was exfoliated from its non-van der Waals bulk counterpart (α-Fe2O3), and found to prefer ferromagnetic ordering around room temperature. However, the underlying mechanism of...

Understanding 2D Semiconductor Edges by Combining Local and Nonlocal Effects: The Case of MoSi2N4

“…3,9−12 Nanoribbons of monolayer transition-metal dichalcogenide (TMDC) have two prototypical types of edges: the nonpolar armchair and polar zigzag edges. 3,9,13,14 Edges (edges of 2D materials analogue of surface reconstructions of 3D bulk materials) exhibit different properties compared with their 2D bulk counterpart, e.g., different edges or different edge-reconstructions exhibit semiconducting or metallic, spinpolarized or spin-paired, charge/spin density waves and/or magnetic behaviors, 15,16 which enable them to have potential applications in different fields such as electronics, spintronics, and catalysis. 3,17,18 Edge reconstruction of TMDC nanorib-bons has been extensively studied due to its significant impact on the intrinsic properties and potential applications.…”

“…Nanoribbons have attracted great attention due to the interesting electronic and physical properties intrinsically associated with their low-dimensionality and edge states. – Nanoribbons and their edges combine several unique properties, such as flexibility and unidirectional properties, of one-dimensional (1D) nanomaterials, the high surface area of 2D nanomaterials, and the electron-confinement and edge effects. Graphene nanoribbons, for example, exhibit promising prospects for nanoelectronics and spintronic devices in terms of their electronic and magnetic properties at zigzag-edges (e.g., half-metallicity under an external electric field). – The nanoribbon edges, especially for polar edges, can lead to exceptional control over the electronic structure, the emergence of novel phenomena, and unique architectures for applications. ,– Nanoribbons of monolayer transition-metal dichalcogenide (TMDC) have two prototypical types of edges: the nonpolar armchair and polar zigzag edges. ,,, Edges (edges of 2D materials analogue of surface reconstructions of 3D bulk materials) exhibit different properties compared with their 2D bulk counterpart, e.g., different edges or different edge-reconstructions exhibit semiconducting or metallic, spin-polarized or spin-paired, charge/spin density waves and/or magnetic behaviors, , which enable them to have potential applications in different fields such as electronics, spintronics, and catalysis. ,, Edge reconstruction of TMDC nanoribbons has been extensively studied due to its significant impact on the intrinsic properties and potential applications. ,, …”

Stiffer Bonding of Armchair Edge in Single‐Layer Molybdenum Disulfide Nanoribbons

“…[ 1 , 2 , 3 , 4 ] Nanoribbon edges have recently attracted attention because they produce unique physical and chemical properties, such as catalytic reactions, optical response, anisotropic thermal conductivity, and local magnetization. [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] They influence the electronic structure of a nanoribbon, such that graphene nanoribbons with armchair edges have a band gap caused by quantum confinement, while those with zigzag edges have a band gap caused by spin polarization at the edges. [ 16 , 17 ] These edges also influence the mechanical response of nanoribbons.…”