Pair-density-wave and chiral superconductivity in twisted bilayer transition-metal-dichalcogenides

Abstract

We theoretically explore possible unconventional superconductivity induced by weak repulsive interactions in twisted bilayer TMD (e.g. WSe${}_2$) in the presence of an out-of-plane electric field. Using renormalization group (RG) analysis, we show that topological chiral superconducting states with Chern number $\mathcal{N}=1,2,4$ (namely $p+ip$, $d+id$, $g+ig$) appear over a large parameter region with moire filling factor around $n=1$. At some special values of applied electric field and in the presence of a weak out-of-plane Zeeman field, spin-polarized pair density wave (PDW) superconductivity can emerge. This spin-polarized PDW state can be probed by experiments such as spin-polarized STM measuring spin-resolved pairing gap and quasi-particle interference. Moreover, the spin-polarized PDW could lead to spin-polarized superconducting diode effect.

5 pages and 4 figs with supplementary material

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Cited by in corpus (40)

• Altermagnetic superconducting diode effect
• Enhanced Superconducting Diode Effect due to coexisting Phases
• Weak-Coupling Theory of Pair Density-Wave Instabilities in Transition Metal Dichalcogenides
• High-order Van Hove singularities and their connection to flat bands
• Orbital Fulde-Ferrell pairing state in moiré Ising superconductors
• Theory of Correlated Insulators and Superconductor at $\nu =1$ in Twisted WSe${}_2$
• Triplet Pair-Density Wave Superconductivity on the $\pi$-flux Square Lattice
• "Quantum Geometric Nesting" and Solvable Model Flat-Band Systems
• Singlet, Triplet and Pair Density Wave Superconductivity in the Doped Triangular-Lattice Moiré System
• Sublattice modulated superconductivity in the Kagome Hubbard model
• Fractional quantum Hall states with variational Projected Entangled-Pair States: a study of the bosonic Harper-Hofstadter model
• 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${}_2$
• Time-Reversal Invariant Topological Moiré Flatband: A Platform for the Fractional Quantum Spin Hall Effect
• Chiral and nodal superconductors in t-J model with valley contrasting flux on triangular moiré lattice
• Possible Sliding Regimes in Twisted Bilayer WTe${}_2$
• Self-consistent theory of $2\times 2$ pair density waves in kagome superconductors
• Majorana zero modes in twisted transition metal dichalcogenides homobilayers
• 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${}_2$
• Pair-density-wave superconductivity: a microscopic model on 2D honeycomb lattice
• Moiré Band Engineering in Twisted Trilayer WSe2
• Magnetism and Metallicity in Moiré Transition Metal Dichalcogenides
• Higher-Order Van Hove Singularities in Kagome Topological Bands
• Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
• Optical response of alternating twisted trilayer graphene
• Enhanced pair-density-wave vertices in a bilayer Hubbard model at half-filling
• Analogue of atomic collapse for adatoms on rhombohedral multilayer graphene
• Dissipation-enhanced non-reciprocal superconductivity: application to multi-valley superconductors
• In-plane magnetic field-induced orbital FFLO superconductivity in twisted WSe${}_2$ homobilayers
• Pair-density-wave phase of strongly interacting electrons on the triangular lattice: A variational Monte Carlo study
• Kekulé order from diffuse nesting near higher-order Van Hove points
• Site-polarized Mott phases competing with a correlated metal in twisted WSe${}_2$
• Spin-triplet pair density wave superconductors
• Anomalous Superfluid Density in Pair-Density-Wave Superconductors
• Emblems of pair density waves: dual identity of topological defects and their transport signatures
• Itinerant magnetism in the triangular lattice Hubbard model at half-doping: Application to twisted transition-metal dichalcogenides
• Chiral topological superconductivity in twisted bilayer and double bilayer graphene
• Onset of spin-valley order and Stoner boundaries in twisted WSe${}_2$
• Thermodynamic Constraints on Perfect Equilibrium Superconducting Diodes