High-pressure synthesis of Dirac materials: layered van der Waals bonded BeN${}_4$ polymorph

Abstract

High pressure chemistry is known to inspire the creation of unexpected new classes of compounds with exceptional properties. Here we report the synthesis at ~90 GPa of novel beryllium polynitrides, monoclinic and triclinic BeN4. The triclinic phase, upon decompression to ambient conditions, transforms into a compound with atomic-thick BeN4 layers interconnected via weak van der Waals bonds consisting of polyacetylene-like nitrogen chains with conjugated π-systems and Be atoms in square-planar coordination. Theoretical calculations for a single BeN4 layer show that its electronic lattice is described by a slightly distorted honeycomb structure reminiscent of the graphene lattice and the presence of Dirac points in the electronic band structure at the Fermi level. The BeN4 layer, i.e. beryllonitrene, represents a qualitatively new class of 2D materials that can be built of a metal atom and polymeric nitrogen chains and host anisotropic Dirac fermions.

References in corpus (31)

• Electric Field Effect in Atomically Thin Carbon Films
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Van der Waals density functionals applied to solids
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Maximally localized Wannier functions: Theory and applications
• Dirac semimetal in three dimensions
• Observation of tunable bandgap and anisotropic Dirac semimetal state in black phosphorus
• Frequency-dependent local interactions and low-energy effective models from electronic structure calculations
• Anisotropic behaviors of massless Dirac fermions in graphene under periodic potential
• Effects of Strain on Electronic Properties of Graphene
• Non-Fermi liquid behaviour of electrons in the half-filled honeycomb lattice (A renormalization group approach)
• Photo-Induced Topological Phase Transition and a Single Dirac-Cone State in Silicene
• Strength of effective Coulomb interactions in graphene and graphite
• Electronic crystals: an experimental overview
• Dirac fermions in borophene
• Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe${}_2$
• Pressure-Induced Zero-Gap Semiconducting State in Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$ Salt
• Accurate Measurement of the Cleavage Energy of Graphite
• Dual origin of defect magnetism in graphene and its reversible switching by molecular doping
• Observation of Dirac Cone Electronic Dispersion in BaFe2As2
• Monte-Carlo study of the semimetal-insulator phase transition in monolayer graphene with realistic inter-electron interaction potential
• Fermi Condensation Near van Hove Singularities Within the Hubbard Model on the Triangular Lattice
• Effects of the Van Hove singularities on magnetism and superconductivity in the t-t' Hubbard model: a parquet approach
• Introducing strong correlation effects into graphene by gadolinium intercalation
• High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re${}_2$(N${}_2$)N${}_2$ stable at ambient conditions
• Observation of quasi-two-dimensional Dirac fermions in ZrTe5
• Laser-induced topological transitions in phosphorene with inversion symmetry
• Graphene in periodic deformation fields: dielectric screening and plasmons
• Quantum Monte Carlo study of static potential in graphene
• Analysis of Dirac Point in the Organic Conductor $\alpha$-(BEDT-TTF)${}_2$I${}_3$

Cited by in corpus (9)

• Ultrahigh stiffness and anisotropic Dirac cones in BeN4 and MgN4 monolayers: A first-principles study
• Anisotropic effects in two-dimensional materials
• Two-dimensional binary transition metal nitride $M$N${}_4$ ($M$ = V, Cr, Mn, Fe, Co) with a graphene-like structure and strong magnetic properties
• Lattice thermal conductivity and elastic modulus of XN4 (X=Be, Mg and Pt) 2D materials using machine learning interatomic potentials
• Prediction of single-atom-thick transition metal nitride CrN${}_4$ with a square-planar network and high-temperature ferromagnetism
• A Scheme to fabricate magnetic graphene-like cobalt nitride CoN4monolayer proposed by first-principles calculations
• Strong electron-phonon coupling and phonon-induced superconductivity in tetragonal C${}_3$N${}_4$ with hole doping
• High-temperature ferromagnetism and strong $\pi$-conjugation feature in two-dimensional manganese tetranitride
• Comment on A Dirac-semimetal two-dimensional BeN4: Thickness-dependent electronic and optical properties [Appl. Phys. Lett. 118, 203103 (2021)]