Superconductivity from collective excitations in magic angle twisted bilayer graphene

Abstract

A purely electronic mechanism is proposed for the unconventional superconductivity recently observed in twisted bilayer graphene (tBG) close to the magic angle. Using the Migdal-Eliashberg framework on a one parameter effective lattice model for tBG we show that a superconducting state can be achieved by means of collective electronic modes in tBG. We posit robust features of the theory, including an asymmetrical superconducting dome and the magnitude of the critical temperature that are in agreement with experiments.

arXiv comment5 pages, 3 figures

References in corpus (26)

• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Graphene plasmonics
• Moire bands in twisted double-layer graphene
• Tuning superconductivity in twisted bilayer graphene
• Dielectric function, screening, and plasmons in 2D graphene
• Dynamical polarization of graphene at finite doping
• Origin of Mott insulating behavior and superconductivity in twisted bilayer graphene
• Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
• Theory of phonon-mediated superconductivity in twisted bilayer graphene
• Topological Superconductivity in Twisted Multilayer Graphene
• Twisted Bilayer Graphene: A Phonon Driven Superconductor
• Symmetry, maximally localized Wannier states, and low energy model for the twisted bilayer graphene narrow bands
• Unconventional Superconductivity and Density Waves in Twisted Bilayer Graphene
• Chiral SDW and d + id superconductivity in the magic-angle twisted bilayer-graphene
• Kohn-Luttinger Superconductivity in Twisted Bilayer Graphene
• Phonon-induced giant linear-in-$T$ resistivity in magic angle twisted bilayer graphene: Ordinary strangeness and exotic superconductivity
• Unconventional superconductivity in nearly flat bands in twisted bilayer graphene
• Superconductivity from Valley Fluctuations and Approximate SO(4) Symmetry in a Weak Coupling Theory of Twisted Bilayer Graphene
• Doped Twisted Bilayer Graphene near Magic Angles: Proximity to Wigner Crystallization not Mott Insulation
• Pairing symmetry of interacting fermions on twisted bilayer graphene superlattice
• Strong electron-phonon coupling, electron-hole asymmetry, and nonadiabaticity in magic-angle twisted bilayer graphene
• Internal screening and dielectric engineering in magic-angle twisted bilayer graphene
• Intrinsically Undamped Plasmon Modes in Narrow Electron Bands
• Singlet superconductivity enhanced by charge order in nested twisted bilayer graphene Fermi surfaces
• Gauge phonon dominated resistivity in twisted bilayer graphene near magic angle

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• Topological and nematic superconductivity mediated by ferro-SU(4) fluctuations in twisted bilayer graphene
• Unconventional superconductivity due to interband polarization
• Collective excitations and plasmon spectrum in twisted bilayer graphene near the magic angle
• Plasmonic Dirac Cone in Twisted Bilayer Graphene
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• Superconductivity induced by the inter-valley Coulomb scattering in a few layers of graphene
• Band Renormalization, Quarter Metals, and Chiral Superconductivity in Rhombohedral Tetralayer Graphene
• Evolution of Superconductivity in Twisted Graphene Multilayers
• Flat-band plasmons in twisted bilayer transition metal dichalcogenides
• Spin-triplet superconductivity from inter-valley Goldstone modes in magic-angle graphene
• Electron-K-Phonon Interaction In Twisted Bilayer Graphene
• Tunable interband and intraband plasmons in twisted double bilayer graphene
• A primer on twistronics: A massless Dirac fermion's journey to moiré patterns and flat bands in twisted bilayer graphene
• Superconductivity in twisted multilayer graphene: a smoking gun in recent condensed matter physics
• Theory of intrinsic acoustic plasmons in twisted bilayer graphene
• Chiral $p$-wave superconductivity in twisted bilayer graphene from dynamical mean field theory
• Electronic Structure and Kohn-Luttinger Superconductivity of Heavily-Doped Single-Layer Graphene
• Proximity-driven ferromagnetism and superconductivity in the triangular Rashba-Hubbard model
• Nematic insulator at charge neutrality in twisted bilayer graphene
• Tuning flat bands by interlayer interaction, spin-orbital coupling, and external fields in twisted homotrilayer MoS${}_2$
• Acoustic plasmons in type-I Weyl semimetals
• Theoretical determination of the effect of a screening gate on plasmon-induced superconductivity in twisted bilayer graphene
• Nodal Nematic Superconductivity in Multiple-Flat-Band Land
• Coulomb-driven band unflattening suppresses $K$-phonon pairing in moiré graphene
• Acoustic plasmons and isotropic short-range interaction in two-component electron liquids
• Microscopic Mechanism of Pair-, Charge- and Spin-Density-Wave Instabilities in Interacting D-Dimensional Fermi Liquids
• Mean-field Modelling of Moiré Materials: A User's Guide with Selected Applications to Twisted Bilayer Graphene
• Renormalization group study of systems with quadratic band touching
• High-Temperature Superconductivity from Finite-Range Attractive Interaction
• Magic angle and plasmon mode engineering in twisted trilayer graphene with pressure
• Magic distances in twisted bilayer graphene
• Plasmonic Cooper pairing in single layer graphene