Enhanced superconductivity through virtual tunneling in Bernal bilayer graphene coupled to WSe
arXiv:2206.09922 · doi:10.1103/PhysRevB.106.L180502
Abstract
Motivated by a recent experiment [arXiv:2205.05087], we investigate a possible mechanism that enhances superconductivity in hole-doped Bernal bilayer graphene due to a proximate WSe monolayer. We show that the virtual tunneling between WSe and Bernal bilayer graphene, which is known to induce Ising spin-orbit coupling, can generate an additional attraction between two holes, providing a potential explanation for enhancing superconductivity in Bernal bilayer graphene. Using microscopic interlayer tunneling, we derive the Ising spin-orbit coupling and the effective attraction as functions of the twist angle between Bernal bilayer graphene and the WSe monolayer. Our theory provides an intuitive and physical explanation for the intertwined relation between Ising spin-orbit coupling and superconductivity enhancement, which should motivate future studies.
6+13 pages, 5+4 figures. Published version
References in corpus (23)
- Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
- Electric field tunable unconventional superconductivity in alternating twist magic-angle trilayer graphene
- Superconductivity in rhombohedral trilayer graphene
- Isospin magnetism and spin-triplet superconductivity in Bernal bilayer graphene
- Half and quarter metals in rhombohedral trilayer graphene
- Spin-orbit driven band inversion in bilayer graphene by van der Waals proximity effect
- Proximity effects in bilayer graphene on monolayer WSe: Field-effect spin-valley locking, spin-orbit valve, and spin transistor
- Twist-angle dependence of the proximity spin-orbit coupling in graphene on transition-metal dichalcogenides
- Inter-valley coherent order and isospin fluctuation mediated superconductivity in rhombohedral trilayer graphene
- Electron Attraction Mediated by Coulomb Repulsion
- Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene
- Twist-angle dependent proximity induced spin-orbit coupling in graphene/transition-metal dichalcogenide heterostructures
- Acoustic-phonon-mediated superconductivity in rhombohedral trilayer graphene
- Superconductivity from Repulsive Interactions in Rhombohedral Trilayer Graphene: a Kohn-Luttinger-Like Mechanism
- Acoustic-phonon-mediated superconductivity in Bernal bilayer graphene
- Metals, fractional metals, and superconductivity in rhombohedral trilayer graphene
- Emergence of Correlations in Alternating Twist Quadrilayer Graphene
- Competing orders and cascade of degeneracy lifting in doped Bernal bilayer graphene
- Spin-triplet superconductivity from interband effect in doped insulators
- Acoustic-phonon-mediated superconductivity in moiréless graphene multilayers
- New mechanism and exact theory of superconductivity from strong repulsive interaction
- Unconventional superconductivity due to interband polarization
- Correlation-induced triplet pairing superconductivity in graphene-based moiré systems
Cited by in corpus (27)
- Superconductivity and correlated phases in non-twisted bilayer and trilayer graphene
- Tunable superconductivity in electron- and hole-doped Bernal bilayer graphene
- Superconductivity in Twisted Double Bilayer Graphene Stabilized by WSe
- Superconductivity from electronic interactions and spin-orbit enhancement in bilayer and trilayer graphene
- Nematicity and Orbital Depairing in Superconducting Bernal Bilayer Graphene with Strong Spin Orbit Coupling
- Flavor symmetry breaking in spin-orbit coupled bilayer graphene
- Stabilizing fluctuating spin-triplet superconductivity in graphene via induced spin-orbit coupling
- Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene
- Topological chiral superconductivity beyond pairing in a Fermi liquid
- Spin-orbit proximity in MoS/bilayer graphene heterostructures
- Superconductivity and spin canting in spin-orbit proximitized rhombohedral trilayer graphene
- Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
- Charge fluctuations, phonons and superconductivity in multilayer graphene
- Superconductivity in twisted transition metal dichalcogenide homobilayers
- Emergent correlated phases in rhombohedral trilayer graphene induced by proximity spin-orbit and exchange coupling
- Inducing superconductivity in bilayer graphene by alleviation of the Stoner blockade
- Superconductivity from repulsive interactions in Bernal-stacked bilayer graphene
- Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene
- Symmetry-broken metallic orders in spin-orbit-coupled Bernal bilayer graphene
- Topological flat bands, valley polarization, and interband superconductivity in magic-angle twisted bilayer graphene with proximitized spin-orbit couplings
- Spin and Charge Fluctuation Induced Pairing in ABCB Tetralayer Graphene
- Valley polarization, magnetization, and superconductivity in bilayer graphene near the van Hove singularity
- Visualization of intervalley coherent phase in PtSe2/HOPG heterojunction
- Topological phases, van Hove singularities, and spin texture in magic-angle twisted bilayer graphene in the presence of proximity-induced spin-orbit couplings
- Full, three-quarter, half and quarter Wigner crystals in Bernal bilayer graphene
- Pair density wave in quarter metals from a repulsive fermionic interaction in graphene heterostructures: A renormalization group study
- Charge density waves and stripes in quarter metals of graphene heterostructures