Large Band Gap Quantum Anomalous Hall Phase in Hexagonal Organometallic Frameworks

Abstract

The nontrivial band gap plays a critical role in quantum anomalous Hall (QAH) insulators. In this work, we propose that the intrinsic QAH phase with sizable band gaps up to 367 meV is achieved in two-dimensional hexagonal organometallic frameworks (HOMFs). Based on first-principles calculations and effective model analysis, we uncover that these large band gaps in transition metal based HOMFs are opened by strong spin-orbital coupling of the localized 4d or 5d electrons. Importantly, we reveal that Coulomb correlations can further significantly enhance the nontrivial band gaps. In addition, we suggest a possible avenue to grow these organometallic QAH insulators on a semiconducting SiC(111) substrate, and the topological features are perfectly preserved due to the van der Waals interaction. Our work shows that the correlation remarkably enhances the nontrivial band gaps, providing exotic candidates to realize the QAH states at high temperatures.

17 pages, 5 figures

References in corpus (24)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Maximally localized Wannier functions: Theory and applications
• WannierTools: An open-source software package for novel topological materials
• Bismuthene on a SiC Substrate: A Candidate for a New High-Temperature Quantum Spin Hall Paradigm
• High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
• Trajectory of Anomalous Hall Effect toward the Quantized State in a Ferromagnetic Topological Insulator
• Topological Mott Insulators
• Scale-Invariant Dissipationless Chiral Transport in Magnetic Topological Insulators beyond the Two-Dimensional Limit
• Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
• Quantum Anomalous Hall Effect in 2D Organic Topological Insulators
• Prediction of Near-Room-Temperature Quantum Anomalous Hall Effect on Honeycomb Materials
• Flat Chern Band in a Two-Dimensional Organometallic Framework
• Epitaxial growth of large-gap quantum spin Hall insulator on semiconductor surface
• Strong magnetization and Chern insulators in compressed graphene/CrI${}_3$ van der Waals heterostructures
• Chern insulators from heavy atoms on magnetic substrates
• sd2 Graphene: Kagome Band in Hexagonal lattice
• Functionalized Bismuth Films: Giant Gap Quantum Spin Hall and Valley-Polarized Quantum Anomalous Hall States
• Interaction-Driven Spontaneous Quantum Hall Effect on Kagome Lattice
• Interaction driven phases in the half-filled honeycomb lattice: an infinite density matrix renormalization group study
• Phase diagram of interacting spinless fermions on the honeycomb lattice: A comprehensive exact diagonalization study
• Interaction-induced quantum anomalous Hall phase in (111) bilayer of LaCoO${}_3$
• Diagnosis of interaction-driven topological phase via exact diagonalization
• Interaction-driven Quantum Anomalous Hall Effect in Halogenated Hematite Nanosheets

Cited by in corpus (10)

• Intrinsic Layer-Polarized Anomalous Hall Effect in Bilayer MnBi2Te4
• Designing light-element materials with large effective spin-orbit coupling
• Floquet Engineering of Nonequilibrium Valley-Polarized Quantum Anomalous Hall Effect with Tunable Chern Number
• Intrinsic quantum anomalous Hall phase induced by proximity in germanene/Cr${}_2$Ge${}_2$Te${}_6$ van der Waals heterostructure
• A Two-Dimensional Metal-Organic Framework on Superconducting NbSe${}_2$
• Synthesis and Local Probe Gating of a Monolayer Metal-Organic Framework
• Local gate control of Mott metal-insulator transition in a 2D metal-organic framework
• Spontaneous valley polarization in 2D organometallic lattice
• Electric and magnetic fields tuned spin-polarized topological phases in two-dimensional ferromagnetic MnBi${}_4$Te${}_7$
• Intrinsic Valley-Related Multiple Hall Effect in 2D Organometallic Lattice