Weak-field Hall Resistivity and Spin/Valley Flavor Symmetry Breaking in Magic-Angle Twisted Bilayer Graphene

Abstract

Near a magic twist angle, the lowest energy conduction and valence bands of bilayer graphene moiré superlattices become extremely narrow. The band dispersion that remains is sensitive to the moiré's strain pattern, nonlocal tunneling between layers, and filling-factor dependent Hartree and exchange band renormalizations. In this article we analyze the influence of these band-structure details on the pattern of flavor-symmetry-breaking observed in this narrow band system, and on the associated pattern of Fermi surface reconstructions revealed by weak-field-Hall and Schubnikov-de Haas magneto-transport measurements.

arXiv commentMinor update to main text; added survey of (magneto-)transport experiments to supplemental material

References in corpus (39)

• 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
• Landau level degeneracy and quantum Hall effect in a graphite bilayer
• 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 Angle Spectroscopy
• Origin of Magic Angles in Twisted Bilayer Graphene
• Imaging Electronic Correlations in Twisted Bilayer Graphene near the Magic Angle
• Charge-Order and Broken Rotational Symmetry in Magic Angle Twisted Bilayer Graphene
• Spectroscopic signatures of many-body correlations in magic angle twisted bilayer graphene
• Untying the insulating and superconducting orders in magic-angle graphene
• All "Magic Angles" Are "Stable" Topological
• Cascade of electronic transitions in magic-angle twisted bilayer graphene
• Strongly Correlated Chern Insulators in Magic-Angle Twisted Bilayer Graphene
• Cascade of Phase Transitions and Dirac Revivals in Magic Angle Graphene
• Decoupling superconductivity and correlated insulators in twisted bilayer graphene
• Mapping the twist angle and unconventional Landau levels in magic angle graphene
• Coulomb-driven broken-symmetry states in doubly gated suspended bilayer graphene
• Faithful Tight-binding Models and Fragile Topology of Magic-angle Bilayer Graphene
• Chern Insulators and Topological Flat-bands in Magic-angle Twisted Bilayer Graphene
• Superconductivity without insulating states in twisted bilayer graphene stabilized by monolayer WSe${}_2$
• Broken symmetry states and divergent resistance in suspended bilayer graphene
• Relaxation and Domain Formation in Incommensurate 2D Heterostructures
• Electrostatic effects, band distortions and superconductivity in twisted graphene bilayers
• Ground State and Hidden Symmetry of Magic Angle Graphene at Even Integer Filling
• An exact continuum model for low-energy electronic states of twisted bilayer graphene
• Hofstadter subband ferromagnetism and symmetry broken Chern insulators in twisted bilayer graphene
• Imaging orbital ferromagnetism in a moiré Chern insulator
• Symmetry broken Chern insulators and magic series of Rashba-like Landau level crossings in magic angle bilayer graphene
• Theories for the correlated insulating states and quantum anomalous Hall phenomena in twisted bilayer graphene
• Local Compressibility Measurements of Correlated States in Suspended Bilayer Graphene
• Continuum models for twisted bilayer graphene: the effects of lattice deformation and hopping parameter
• Lattice Theory of Pseudospin Ferromagnetism in Bilayer Graphene: Competing Orders and Interaction Induced Quantum Hall States
• Intra-Landau level Cyclotron Resonance in Bilayer Graphene
• Quantum Hall Effects in Graphene-Based Two-Dimensional Electron Systems
• Orbital and interlayer Skyrmions crystals in bilayer graphene

Cited by in corpus (40)

• Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
• Anomalous Hall metal and fractional Chern insulator in twisted transition metal dichalcogenides
• Gate-Defined Josephson Junctions in Magic-Angle Twisted Bilayer Graphene
• Global Phase Diagram of the Normal State of Twisted Bilayer Graphene
• Imaging inter-valley coherent order in magic-angle twisted trilayer graphene
• Kondo Lattice Model of Magic-Angle Twisted-Bilayer Graphene: Hund's Rule, Local-Moment Fluctuations, and Low-Energy Effective Theory
• Theory of correlated insulators and superconductivity in twisted bilayer graphene
• Spectroscopy of Twisted Bilayer Graphene Correlated Insulators
• Phonons in magic-angle twisted bilayer graphene
• Symmetric Kondo Lattice States in Doped Strained Twisted Bilayer Graphene
• Dynamical correlations and order in magic-angle twisted bilayer graphene
• Continuum effective Hamiltonian for graphene bilayers for an arbitrary smooth lattice deformation from microscopic theories
• Supermoiré low-energy effective theory of twisted trilayer graphene
• Skyrmions in twisted bilayer graphene: stability, pairing, and crystallization
• Time-Reversal Even Charge Hall Effect from Twisted Interface Coupling
• TBG as Topological Heavy Fermion: II. Analytical approximations of the model parameters
• Does filling-dependent band renormalization aid pairing in twisted bilayer graphene?
• Unusual magnetotransport in twisted bilayer graphene from strain-induced open Fermi surfaces
• Bistritzer-MacDonald dynamics in twisted bilayer graphene
• Angle-resolved transport nonreciprocity and spontaneous symmetry breaking in twisted trilayer graphene
• From electrons to baby skyrmions in Chern ferromagnets: A topological mechanism for spin-polaron formation in twisted bilayer graphene
• Kekulé spiral order in magic-angle graphene: a density matrix renormalization group study
• Electron-phonon coupling and competing Kekulé orders in twisted bilayer graphene
• Pseudospin Paramagnons and the Superconducting Dome in Magic Angle Twisted Bilayer Graphene
• Kekulé spiral order at all nonzero integer fillings in twisted bilayer graphene
• Cascade of transitions in twisted and non-twisted graphene layers within the van Hove scenario
• In-plane orbital magnetization as a probe for symmetry breaking in strained twisted bilayer graphene
• Low-energy optical sum-rule in moiré graphene
• Weak Coupling Theory of Magic-Angle Twisted Bilayer Graphene
• Observation of first-order quantum phase transitions and ferromagnetism in twisted double bilayer graphene
• Electrically tunable correlated domain wall network in twisted bilayer graphene
• Strain Disorder and Gapless Intervalley Coherent Phase in Twisted Bilayer Graphene
• Neutral magic-angle bilayer graphene: Condon instability and chiral resonances
• Atomistic theory of moiré Hofstadter's butterfly in magic-angle graphene
• Independently Tunable Flat Bands and Correlations in a Graphene Double Moiré System
• Layer Hall counterflow as a model probe of magic-angle twisted bilayer graphene
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Analogue of atomic collapse for adatoms on rhombohedral multilayer graphene
• Mean-field Modelling of Moiré Materials: A User's Guide with Selected Applications to Twisted Bilayer Graphene
• Sliding-dependent electronic structures of alternating-twist tetralayer graphene