Ni-based transition-metal trichalcogenide monolayer: a strongly correlated quadruple-layer graphene

Abstract

We investigate the electronic physics of layered Ni-based trichalcogenide NiPX${}_3$ (X=S, Se), a member of transition-metal trichalcogenides (TMTs) with the chemical formula, ABX${}_3$. These Ni-based TMTs distinguish themselves from other TMTs as their low energy electronic physics can be effectively described by the two $e_g$ d-orbitals. The major band kinematics is characterized by the unusal long-range effective hopping between two third nearest-neighbor (TNN) Ni sites in the two-dimensional Ni honeycomb lattice so that the Ni lattice can be equivalently viewed as four weakly coupled honeycomb sublattices. Within each sublattice, the electronic physics is described by a strongly correlated two-orbital graphene-type model that results in an antiferromagnetic (AFM) ground state near half filling. We show that the low energy physics in a paramagnetic state is determined by the eight Dirac cones which locate at $K$, $K^{\prime }$, $\frac{K}{2}$ and $\frac{K^{\prime }}{2}$ points in the first Brillouin zone with a strong AFM fluctuation between two $K(K^{\prime })$ and $\frac{K^{\prime }}{2}(\frac{K}{2})$ Dirac cones and carrier doping can sufficiently suppress the long-range AFM order and allow other competing orders, such as superconductivity, to emerge. The material can be an ideal system to study many exotic phenomena emerged from strong electron-electron correlation, including a potential $d\pm id$ superconducting state at high temperature.

arXiv comment10 pages

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Cited by in corpus (17)

• Controlling magnetic exchange and anisotropy by non-magnetic ligand substitution in layered MPX3 (M = Ni, Mn; X = S, Se)
• Highly sensitive spin-flop transition in antiferromagnetic van-der Waals material MPS3 (M = Ni and Mn)
• Proximity effects in graphene on monolayers of transition-metal phosphorus trichalcogenides MPX${}_3$
• Evidence for biquadratic exchange in the quasi-two-dimensional antiferromagnet FePS${}_3$
• Ultrafast optical excitation of magnetic dynamics in van der Waals magnets: Coherent magnons and BKT dynamics in NiPS${}_3$
• Adsorption of water molecules on pristine and defective NiPX${}_3$ (X: S, Se) monolayers
• Generalized Fermion Doubling Theorems: Classification of 2D Nodal Systems in Terms of Wallpaper Groups
• Topological superconductivity in Ni-based transition-metal trichalcogenide superconductors
• Spin model for the Honeycomb $\mathrm{NiP}{\mathrm{S}}_3$
• Unconventional High Temperature Superconductivity in Cubic Zinc-blende Transition Metal Compounds
• Microscopic origin of local electric polarization in NiPS${}_3$
• Quantum Fluctuations in the van der Walls material $\mathrm{NiP}{\mathrm{S}}_3$
• BaCuS2: a superconductor with moderate electron-electron correlation
• Controlling topology through targeted composite symmetry manipulation in magnetic systems
• AMaRaNTA: Automated First-Principles Exchange Parameters In 2D Magnets
• Stabilization of zigzag order in NiPS${}_3$ via positive biquadratic interaction
• Crystal field tuned spin-flip luminescence in NiPS3