Superconductivity in the twisted bilayer transition metal dichalcogenide WSe${}_2$ : a quantum cluster study

Abstract

The observation of flat energy bands in transition metal dichalcogenide bilayers such as twisted WSe${}_2$ makes those materials interesting prospects for reproducing the behavior observed in graphene-based systems. We use an effective Hubbard model providing a description of twisted WSe${}_2$ to explore the presence of superconductivity, which was previously reported in experiments. Using both the variational cluster approximation and cluster dynamical mean-field theory, we predict the existence of chiral supercondictivity of type $d\pm id$ that can be tuned by the twist angle and by the application of a perpendicular displacement field, in both electron- and hole-doped systems.

8 pages, 4 figures

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Cited by in corpus (19)

• Quantum Phase Diagram and Spontaneously Emergent Topological Chiral Superconductivity in Doped Triangular-Lattice Mott Insulators
• Orbital Fulde-Ferrell pairing state in moiré Ising superconductors
• Mixed singlet-triplet superconducting state within the moiré $t$-$J$-$U$ model as applied to the description of twisted WSe${}_2$ bilayer
• Theory of Correlated Insulators and Superconductor at $\nu =1$ in Twisted WSe${}_2$
• Singlet, Triplet and Pair Density Wave Superconductivity in the Doped Triangular-Lattice Moiré System
• Topological superconductivity with mixed singlet-triplet pairing in moiré transition-metal-dichalcogenide bilayers
• Theory of Topological Superconductivity and Antiferromagnetic Correlated Insulators in Twisted Bilayer WSe${}_2$
• Switching between Mott-Hubbard and Hund physics in moiré quantum simulators
• Topological Chiral Superconductivity Mediated by Intervalley Antiferromagnetic Fluctuations in Twisted Bilayer WSe${}_2$
• Approximate symmetries, insulators, and superconductivity in continuum-model description of twisted WSe${}_2$
• Doping dependence of chiral superconductivity in near $45^{\circ }$ twisted bilayer cuprates
• Magnetism and Metallicity in Moiré Transition Metal Dichalcogenides
• Moiré Band Engineering in Twisted Trilayer WSe2
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Analogue of atomic collapse for adatoms on rhombohedral multilayer graphene
• Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
• Site-polarized Mott phases competing with a correlated metal in twisted WSe${}_2$
• Onset of spin-valley order and Stoner boundaries in twisted WSe${}_2$
• Itinerant magnetism in the triangular lattice Hubbard model at half-doping: Application to twisted transition-metal dichalcogenides