Flavor symmetry breaking in spin-orbit coupled bilayer graphene
arXiv:2302.12284 · doi:10.1103/PhysRevB.107.L201119
Abstract
Recent experimental discovery of flavor symmetry breaking metallic phases in Bernal-stacked bilayer graphene points to the strongly interacting nature of electrons near the top (bottom) of its valence (conduction) band. Superconductivity was also observed in between these symmetry breaking phases when the graphene bilayer is placed under a small in-plane magnetic field or in close proximity to a monolayer WSe substrate. Here we address the correlated nature of the band edge electrons and obtain the quantum phase diagram of their many-body ground states incorporating the effect of proximity induced spin-orbit coupling. We find that in addition to the spin/valley flavor polarized half and quarter metallic states, two types of intervalley coherent phases emerge near the phase boundaries between the flavor polarized metals. Both spin-orbit coupling and in-plane magnetic field disfavor the spin-unpolarized valley coherent phase. Our findings suggest possible competition between intervalley coherence and superconducting orders, arising from the intriguing correlation effects in bilayer graphene in the presence of spin-orbit coupling.
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- Nematicity and Orbital Depairing in Superconducting Bernal Bilayer Graphene with Strong Spin Orbit Coupling
- Electrical control of spin and valley in spin-orbit coupled graphene multilayers
- Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene
- Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
- Gate-tunable topological phases in superlattice modulated bilayer graphene
- Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene
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- Promoting and imaging intervalley coherent order in rhombohedral tetralayer graphene on MoS2
- Topological frequency conversion in rhombohedral multilayer graphene
- Ferroelectric switching control of spin current in graphene proximitized by InSe
- Probing valley phenomena with gate-defined valley splitters
- Visualization of intervalley coherent phase in PtSe2/HOPG heterojunction
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- Full, three-quarter, half and quarter Wigner crystals in Bernal bilayer graphene
- Topological phases, van Hove singularities, and spin texture in magic-angle twisted bilayer graphene in the presence of proximity-induced spin-orbit couplings