Observation of Coexisting Dirac Bands and Moiré Flat Bands in Magic-Angle Twisted Trilayer Graphene
arXiv:2209.02199 · doi:10.1002/adma.202205996
Abstract
Moiré superlattices that consist of two or more layers of two-dimensional materials stacked together with a small twist angle have emerged as a tunable platform to realize various correlated and topological phases, such as Mott insulators, unconventional uperconductivity and quantum anomalous Hall effect. Recently, the magic-angle twisted trilayer graphene (MATTG) has shown both robust superconductivity similar to magic-angle twisted bilayer graphene (MATBG) and other unique properties, including the Pauli-limit violating and re-entrant superconductivity. These rich properties are deeply rooted in its electronic structure under the influence of distinct moiré potential and mirror symmetry. Here, combining nanometer-scale spatially resolved angle-resolved photoemission spectroscopy (nano-ARPES) and scanning tunneling microscopy/spectroscopy (STM/STS), we systematically measure the yet unexplored band structure of MATTG near charge neutrality. Our measurements reveal the coexistence of the distinct dispersive Dirac band with the emergent moiré flat band, showing nice agreement with the theoretical calculations. These results serve as a stepstone for further understanding of the unconventional superconductivity in MATTG.
arXiv commentaccepted by Advanced Materials
References in corpus (40)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Moire bands in twisted double-layer graphene
- Tuning superconductivity in twisted bilayer graphene
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- Magic continuum in twisted bilayer WSe2
- Magic Angle Spectroscopy
- Flat Bands in Slightly Twisted Bilayer Graphene
- Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
- Tunable Correlated Chern Insulator and Ferromagnetism in Trilayer Graphene/Boron Nitride Moiré Superlattice
- Imaging Electronic Correlations in Twisted Bilayer Graphene near the Magic Angle
- Electric Field Tunable Correlated States and Magnetic Phase Transitions in Twisted Bilayer-Bilayer Graphene
- Charge-Order and Broken Rotational Symmetry in Magic Angle Twisted Bilayer Graphene
- Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
- Spontaneously polarized half-gapped superconductivity
- Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
- Correlated states in twisted double bilayer graphene
- Strange metal in magic-angle graphene with near Planckian dissipation
- Optical Absorption in Twisted Bilayer Graphene
- Electric field tunable unconventional superconductivity in alternating twist magic-angle trilayer graphene
- Strongly Correlated Chern Insulators in Magic-Angle Twisted Bilayer Graphene
- Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2
- Nematicity and Competing Orders in Superconducting Magic-Angle Graphene
- Electrical switching of magnetic order in an orbital Chern insulator
- Correlated Insulating States in Twisted Double Bilayer Graphene
- Electrically tunable correlated and topological states in twisted monolayer-bilayer graphene
- Magic Angle Hierarchy in Twisted Graphene Multilayers
- Visualization of the flat electronic band in twisted bilayer graphene near the magic angle twist
- Electronic spectrum of twisted graphene layers under heterostrain
- Tunable van Hove Singularities and Correlated States in Twisted Trilayer Graphene
- Twistons in a Sea of Magic
- Coexistence of ultraheavy and ultrarelativistic Dirac quasiparticles in sandwiched trilayer graphene
- Flat bands and perfect metal in trilayer moiré graphene
- Heterostrain rules the flat-bands in magic-angle twisted graphene layers
- In-plane critical magnetic fields in magic-angle twisted trilayer graphene
- Mirror Symmetry Breaking and Lateral Stacking Shifts in Twisted Trilayer Graphene
- Band-unfolding approach to Moirè-induced band-gap opening and Fermi-level-velocity reduction in twisted bilayer graphene
- Lattice relaxation, mirror symmetry and magnetic field effects on ultraflat bands in twisted trilayer graphene
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- Topology hierarchy of transition metal dichalcogenides built from quantum spin Hall layers
- Prediction of polarization vortices, charge modulation, flat bands, and moiré magnetism in twisted oxide bilayers
- Kekulé spirals and charge transfer cascades in twisted symmetric trilayer graphene
- Superconducting magic-angle twisted trilayer graphene hosts competing magnetic order and moiré inhomogeneities
- Revealing flat bands and hybridization gaps in a twisted bilayer graphene device with microARPES
- Quick Identification of ABC Trilayer Graphene at Nanoscale Resolution via a Near-field Optical Route
- Diagrammatic perturbation approach to moiré bands in twisted bilayer graphene
- RKKY interaction in one-dimensional flat-band lattices
- Chern-Textured Exciton Insulators with Valley Spiral Order in Moiré Materials
- Rashba spin splitting based on trilayer graphene systems
- Quantum simulation of honeycomb lattice model by high-order moiré pattern
- Direct observation of flat bands in near-magic-angle twisted bilayer CVD graphene