Programming Correlated Magnetic States via Gate Controlled Moiré Geometry

Abstract

Understanding quantum many-body systems is at the heart of condensed matter physics. The ability to control the underlying lattice geometry of a system, and thus its many-body interactions, would enable the realization of and transition between emergent quantum ground states. Here, we report in-situ gate switching between honeycomb and triangular lattice geometries of an electron many-body Hamiltonian in R-stacked MoTe2 moiré bilayers, resulting in switchable magnetic exchange interactions. At zero electric field, we observe a correlated ferromagnetic insulator near one hole per moiré unit cell (ν=-1), i.e., a quarter-filled honeycomb lattice, with a widely tunable Curie temperature up to 14K. Fully polarizing layer pseudospin via electric field switches the system into a half-filled triangular lattice with antiferromagnetic interactions. Further doping this layer-polarized superlattice introduces carriers into the empty layer, tuning the antiferromagnetic exchange interaction back to ferromagnetic. Our work demonstrates R-stacked MoTe2 moirés to be a new laboratory for engineering correlated states with nontrivial topology.

arXiv comment13 pages, 4 figures, plus supplementary material

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Cited by in corpus (88)

• Signatures of Fractional Quantum Anomalous Hall States in Twisted MoTe2 Bilayer
• Observation of Fractionally Quantized Anomalous Hall Effect
• Integer and fractional Chern insulators in twisted bilayer MoTe2
• Observation of integer and fractional quantum anomalous Hall effects in twisted bilayer MoTe2
• Superconductivity in twisted bilayer WSe${}_2$
• A Microscopic Perspective on Moiré Materials
• Composite Fermi Liquid at Zero Magnetic Field in Twisted MoTe${}_2$
• Anomalous Hall Crystals in Rhombohedral Multilayer Graphene I: Interaction-Driven Chern Bands and Fractional Quantum Hall States at Zero Magnetic Field
• Kinetic Magnetism in Triangular Moiré Materials
• Quantum geometry in condensed matter
• Non-Abelian fractionalization in topological minibands
• Interaction-driven topological phase diagram of twisted bilayer MoTe${}_2$
• Interplay between topology and correlations in the second moiré band of twisted bilayer MoTe2
• Quantum anomalous Hall crystal at fractional filling of moiré superlattices
• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Superconductivity and spin canting in spin-orbit proximitized rhombohedral trilayer graphene
• Gate-tunable antiferromagnetic Chern insulator in twisted bilayer transition metal dichalcogenides
• Cavity engineering of solid-state materials without external driving
• Electrically tuned topology and magnetism in twisted bilayer MoTe${}_2$ at ${\nu }_h=1$
• Helical trilayer graphene: a moiré platform for strongly-interacting topological bands
• Halperin States of Particles and Holes in Ideal Time Reversal Invariant Pairs of Chern Bands and The Fractional Quantum Spin Hall Effect in Moiré MoTe${}_2$
• Reversible Non-Volatile Electronic Switching in a Near Room Temperature van der Waals Ferromagnet
• Doping a fractional quantum anomalous Hall insulator
• Hidden States and Dynamics of Fractional Fillings in tMoTe2 Moiré Superlattices
• Visualizing the microscopic origins of topology in twisted molybdenum ditelluride
• Orbital Chern Insulator at $\nu =-2$ in Twisted MoTe${}_2$
• Quantum Geometry Probed by Chiral Excitonic Optical Response of Chern Insulators
• Theory of intervalley-coherent AFM order and topological superconductivity in tWSe${}_2$
• Majorana zero modes in twisted transition metal dichalcogenides homobilayers
• Topological quantum phase transitions driven by a displacement field in the twisted MoTe2 bilayers
• Engineering robust strain transmission in van der Waals heterostructure devices
• A New Moiré Platform Based on M-Point Twisting
• Remote gate control of topological transitions in moiré superlattices via cavity vacuum fields
• Transport Anisotropy in One-dimensional Graphene Superlattice in the High Kronig-Penney Potential Limit
• Coherent Modulation of Two-Dimensional Moiré States with On-Chip THz Waves
• Evolution of flat bands in MoSe${}_2$/WSe${}_2$ moiré lattices: A study combining machine learning and band unfolding methods
• Spin-polarons and ferromagnetism in doped dilute Wigner-Mott insulators
• Mott insulators in moiré transition metal dichalcogenides at fractional fillings: Slave-rotor mean-field theory
• Charge-Neutral Electronic Excitations in Quantum Insulators
• Quantum Geometry and the Hidden Scales in Materials
• Topological Chiral Superconductivity Mediated by Intervalley Antiferromagnetic Fluctuations in Twisted Bilayer WSe${}_2$
• Pressure-Driven Moiré Potential Enhancement and Tertiary Gap Opening in Graphene/h-BN Heterostructure
• Observation of Ferromagnetic Phase in the Second Moiré Band of Twisted MoTe2
• Quantum anomalous, spin, and valley Hall effects in pentalayer rhombohedral graphene moiré superlattices
• Tunable exciton valley-pseudospin orders in moiré Bose-Hubbard model
• Intrinsic Dipole Hall effect in twisted MoTe${}_2$: magnetoelectricity and contact-free signatures of topological transitions
• Optical Switching of Moiré Chern Ferromagnet
• Supersymmetry dictated topology in periodic gauge fields and realization in strained and twisted 2D materials
• Moiré Band Engineering in Twisted Trilayer WSe2
• Doping induced multiferroicity and quantum anomalous Hall effect in $\alpha$-In${}_2$Se${}_3$ thin films
• Ferromagnetic semimetal and charge-density wave phases of interacting electrons in a honeycomb moiré potential
• Chern-Textured Exciton Insulators with Valley Spiral Order in Moiré Materials
• Itinerant ferromagnetism in transition metal dichalcogenides moiré superlattices
• Topological magnons and domain walls in twisted bilayer MoTe${}_2$
• Double exchange, itinerant ferromagnetism and topological Hall effect in moiré heterobilayer
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Itinerant topological magnons and spin excitons in twisted transition metal dichalcogenides: Mapping electron topology to spin counterpart
• Quantum Phases in Twisted Homobilayer Transition Metal Dichalcogenides
• Frustration induced Itinerant Ferromagnetism of Fermions in Optical Lattice
• Angle evolution of the superconducting phase diagram in twisted bilayer WSe2
• Anisotropic moiré band flattening in twisted bilayers of M-valley MXenes
• Magnetic Moiré Systems: a review
• Quantum-geometric dipole: a topological boost to flavor ferromagnetism in flat bands
• Interface engineering of van der Waals heterostructures towards energy-efficient quantum devices operating at high temperatures
• Orbital Magnetization of Correlated States in Twisted Bilayer Transition Metal Dichalcogenides
• Candidate for a Fractional Topological Insulator in Twisted MoTe2
• Light-matter interactions in layered materials and heterostructures: from moiré physics and magneto-optical effects to ultrafast dynamics and hybrid meta-photonics
• Magnetic Hofstadter cascade in a twisted semiconductor homobilayer
• Layer-Resolved Quantum Transport in Twisted Bilayer Graphene: Counterflow and Machine Learning Predictions
• Layer-dependent transport properties in the Moiré of strained homobilayer transition metal dichalcogenides
• False Vacuum Decay in Flat-Band Ferromagnets: Role of Quantum Geometry and Chiral Edge States
• Site-polarized Mott phases competing with a correlated metal in twisted WSe${}_2$
• Probing Quantum Anomalous Hall States in Twisted Bilayer WSe2 via Attractive Polaron Spectroscopy
• Geometric Frustration Assisted Kinetic Ferromagnetism in Doped Mott Insulators
• Optical signatures of -1/3 fractional quantum anomalous Hall state in twisted MoTe2
• Quantum Magnetism in Wannier-Obstructed Mott Insulators
• Kekulé order from diffuse nesting near higher-order Van Hove points
• Heavy fermion phase diagram in magic-angle twisted trilayer graphene
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• Effective K valley Hamiltonian for TMD bilayers under pressure and application to twisted bilayers with pressure-induced topological phase transitions
• Onset of spin-valley order and Stoner boundaries in twisted WSe${}_2$
• Higher Chern bands in helical homotrilayer transition metal dichalcogenides
• Scalable and deterministic construction of moiré superlattice in 2D materials using stressor films
• Itinerant magnetism in Hubbard models with long-range interactions
• Anomalous Landau level gaps near magnetic transitions in monolayer WSe${}_2$
• Stripe antiferromagnetism and chiral superconductivity in tWSe${}_2$
• Magnetic and nematic order of Bose-Fermi mixtures in moiré superlattices of 2D semiconductors
• Doping-induced Quantum Anomalous Hall Crystals and Topological Domain Walls