Multifunctional Two-dimensional van der Waals Janus Magnet Cr-based Dichalcogenide Halides

Abstract

Two-dimensional van der Waals Janus materials and their heterostructures offer fertile platforms for designing fascinating functionalities. Here, by means of systematic first-principles studies on van der Waals Janus monolayer Cr-based dichalcogenide halides CrYX (Y=S, Se, Te; X=Cl, Br, I), we find that CrSX (X=Cl, Br, I) are the very desirable high TC ferromagnetic semiconductors with an out-of-plane magnetization. Excitingly, by the benefit of the large magnetic moments on ligand S2- anions, the sought-after large-gap quantum anomalous Hall effect and sizable valley splitting can be achieved through the magnetic proximity effect in van der Waals heterostructures CrSBr/Bi2Se3/CrSBr and MoTe2/CrSBr, respectively. Additionally, we show that large Dzyaloshinskii-Moriya interactions give rise to skyrmion states in CrTeX (X=Cl, Br, I) under external magnetic fields. Our work reveals that two-dimensional Janus magnet Cr-based dichalcogenide halides have appealing multifunctionalities in the applications of topological electronic and valleytronic devices.

arXiv comment4 figures, 24 pages; accepted by npj Computational Materials

References in corpus (32)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Van der Waals density functionals applied to solids
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• WannierTools: An open-source software package for novel topological materials
• Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBi${}_2$Te${}_4$
• Skyrmions at room temperature : From magnetic thin films to magnetic multilayers
• Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
• Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
• Room Temperature Intrinsic Ferromagnetism in Epitaxial Manganese Selenide Films in the Monolayer Limit
• Tunable Room Temperature Magnetic Skyrmions in Ir/Fe/Co/Pt Multilayers
• Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3
• Giant and tunable valley degeneracy splitting in MoTe2
• Atomically Thin CrCl3: An in-Plane Layered Antiferromagnetic Insulator
• Room temperature 2D ferromagnetism in few-layered 1$T$-CrTe${}_2$
• Very large Dzyaloshinskii-Moriya interaction in two-dimensional Janus manganese dichalcogenides and its application to realize skyrmion states
• Two dimensional magnets: Forgotten history and recent progress towards spintronic applications
• VI3 - a new layered ferromagnetic semiconductor
• Large valley splitting in monolayer WS${}_2$ by proximity coupling to an insulating antiferromagnetic substrate
• Proximity exchange effects in MoSe${}_2$ and WSe${}_2$ heterostructures with CrI${}_3$: twist angle, layer, and gate dependence
• Intrinsic skyrmions in monolayer Janus magnets
• Enhanced Stability of Skyrmions in Two-Dimensional Chiral Magnets with Rashba Spin-Orbit Coupling
• In-plane magnetic domains and Néel-like domain walls in thin flakes of the room temperature CrTe${}_2$ van der Waals ferromagnet
• Quantum anomalous Hall effect in magnetic topological insulators
• Magnetize Topological Surface States of Bi2Se3 with a CrI3 Monolayer
• Topological Charge Analysis of Ultrafast Single Skyrmion Creation
• Tunable magneto-optical effect, anomalous Hall effect and anomalous Nernst effect in two-dimensional room-temperature ferromagnet $1T$-CrTe${}_2$
• Tunable anomalous Hall transport in bulk and two-dimensional 1$T$-CrTe${}_2$: A first-principles study
• Axion Insulator State in a Ferromagnet/Topological Insulator/Antiferromagnet Heterostructure
• Thermally Driven Topology in Chiral Magnets
• Axion Insulator State with ferromagnetic ordering in CrI3/Bi2Se3/MnBi2Se4 Heterostructure
• Hysteresis features of the transition-metal dichalcogenides VX${}_2$ (X=S, Se, and Te)

Cited by in corpus (10)

• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Dielectric tunability of magnetic properties in orthorhombic ferromagnetic monolayer CrSBr
• Switching intrinsic magnetic skyrmions with controllable magnetic anisotropy in van der Waals multiferroic heterostructures
• Magnetic Anisotropy in Two-dimensional van der Waals Magnetic Materials and Their Heterostructures: Importance, Mechanisms, and Opportunities
• Nonvolatile Magnonics in Bilayer Magnetic Insulators
• Thermal Hall Effect of Magnons from Many-Body Skew Scattering
• Above room-temperature two-dimensional ferromagnetic half-metals in Mn-based Janus magnets
• Tuning magnetic exchange interactions in 2D magnets: the case of CrGeX${}_3$ (X = Se, Te) and Janus Cr${}_2$Ge${}_2$(Se,Te)${}_3$ monolayers
• Topological switching in bilayer magnons via electrical control
• Chromium chalcohalide Janus monolayer ferromagnets with perpendicular magnetic anisotropy and high Curie temperature