Ferromagnetic two-dimensional crystals: Single layers of K2CuF4

Abstract

The successful isolation of graphene ten years ago has evoked a rapidly growing scientific interest in the nature of two-dimensional (2D) crystals. A number of different 2D crystals has been produced since then, with properties ranging from superconductivity to insulating behavior. Here, we predict the possibility for realizing ferromagnetic 2D crystals by exfoliating atomically thin films of K2CuF4. From a first-principles theoretical analysis, we find that single layers of K2CuF4 form exactly 2D Kosterlitz-Thouless systems. The 2D crystal can form a free-standing membrane, and exhibits an experimentally accessible transition temperature and robust magnetic moments of 1 Bohr magneton per formula unit. 2D K2CuF4 unites ferromagnetic and insulating properties and is a demonstration of principles for nanoelectronics such as novel 2D-based heterostructures.

8 pages, 6 figures (supplementary information included)

References in corpus (8)

• Electric Field Effect in Atomically Thin Carbon Films
• Two Dimensional Atomic Crystals
• Boron nitride substrates for high-quality graphene electronics
• Vertical Field Effect Transistor based on Graphene-WS2 Heterostructures for flexible and transparent electronics
• Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices
• Macroscopic graphene membranes and their extraordinary stiffness
• Strong Coulomb drag and broken symmetry in double-layer graphene
• Ultra-thin Topological Insulator Bi2Se3 Nanoribbons Exfoliated by Atomic Force Microscopy

Cited by in corpus (29)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Magnetic 2D materials and heterostructures
• Robust Intrinsic Ferromagnetism and Half Semiconductivity in Stable Two-Dimensional Single-Layer Chromium Trihalides
• On the origin of magnetic anisotropy in two dimensional CrI${}_3$
• Very Large Tunneling Magnetoresistance in Layered Magnetic Semiconductor CrI${}_3$
• Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3
• Titanium trisulfide monolayer: A new direct-gap semiconductor with high and anisotropic carrier mobility
• Magnetic Two-Dimensional Chromium Trihalides: A Theoretical Perspective
• Long Range Intrinsic Ferromagnetism in Two Dimensional Materials and Dissipationless Future Technologies
• Calculating critical temperatures for ferromagnetic order in two-dimensional materials
• In-plane magnetic domains and Néel-like domain walls in thin flakes of the room temperature CrTe${}_2$ van der Waals ferromagnet
• Critical behavior of quasi-two-dimensional semiconducting ferromagnet CrGeTe${}_3$
• Relativistic exchange interactions in CrX${}_3$ (X=Cl, Br, I) monolayers
• Construction of van der Waals magnetic tunnel junction using ferromagnetic layered dichalcogenide
• Type-I and type-II Nodal Lines Coexistence in the Antiferromagnetic monolayer CrAs${}_2$
• Exfoliation and van der Waals heterostructure assembly of intercalated ferromagnet Cr1/3TaS2
• Tunable magneto-optical effect, anomalous Hall effect and anomalous Nernst effect in two-dimensional room-temperature ferromagnet $1T$-CrTe${}_2$
• Role of quantum confinement and interlayer coupling in CrI${}_3$-graphene magnetic tunnel junctions
• Modeling Ferro- and Antiferromagnetic Interactions in Metal-Organic Coordination Networks
• Systematic DFT+U and Quantum Monte Carlo benchmark of magnetic two-dimensional (2D) CrX${}_3$ (X = I, Br, Cl, F)
• Two-dimensional quantum-spin-1/2 XXZ magnet in zero magnetic field: global thermodynamics from renormalization group theory
• Two Dimensional Ferromagnetic Semiconductor: Monolayer CrGeS${}_3$
• Effects of magnetic anisotropy on spin and thermal transports in classical antiferromagnets on the square lattice
• The intrinsic ferromagnetism of two-dimensional (2D) MnO${}_2$ revisited: A many-body Quantum Monte Carlo and DFT+U study
• Toward improved property prediction of 2D materials using many-body quantum Monte Carlo methods
• Conformal field theory and the hot phase of three-dimensional U(1) gauge theory
• MXene Fe2C as a promising candidate for the 2D XY ferromagnet
• Transport of Dirac electrons in a random magnetic field in topological heterostructures
• DMRG and Monte Carlo studies of ${\text{CrI}}_3$ magnetic phases and the phase transition