Chiral superconductivity from spin polarized Chern band in twisted MoTe${}_2$

Abstract

Superconductivity has been observed in twisted MoTe2 within the anomalous Hall metal parent state. Key signatures-including a fully spin/valley polarized normal state, anomalous Hall resistivity hysteresis, superconducting phase adjacent to the fractional Chern insulating state and a narrow superconducting dome at zero gating field-collectively indicate chiral superconductivity driven by intravalley pairing of electrons. Within the Kohn-Luttinger mechanism, we compute the superconducting phase diagram via random phase approximation, incorporating Coulomb repulsion in a realistic continuum model. Our results identify a dominant intravalley pairing with a narrow superconducting dome of p+ip type at zero gate field. This chiral phase contrasts sharply with the much weaker time-reversal-symmetric intervalley pairing at finite gating field. Our work highlights the role of band topology in achieving robust topological superconductivity, and supports the chiral and topological nature of the superconductivity observed in twisted MoTe2.

5 pages + 4 figures

References in corpus (31)

• Signatures of Fractional Quantum Anomalous Hall States in Twisted MoTe2 Bilayer
• Observation of Fractionally Quantized Anomalous Hall Effect
• Moiré heterostructures as a condensed matter quantum simulator
• Quantum anomalous Hall effect from intertwined moiré bands
• Integer and fractional Chern insulators in twisted bilayer MoTe2
• Observation of integer and fractional quantum anomalous Hall effects in twisted bilayer MoTe2
• Superfluidity and Quantum Geometry in Twisted Multilayer Systems
• Superconductivity in twisted bilayer WSe${}_2$
• Signatures of Chiral Superconductivity in Rhombohedral Graphene
• Magic Angles and Fractional Chern Insulators in Twisted Homobilayer TMDs
• Mapping twist-tuned multiband topology in bilayer WSe${}_2$
• Polarization-driven band topology evolution in twisted MoTe${}_2$ and WSe${}_2$
• Maximally Localized Wannier Orbitals, Interaction Models and Fractional Quantum Anomalous Hall Effect in Twisted Bilayer MoTe2
• The Ginzburg-Landau theory of flat band superconductors with quantum metric
• Non-Abelian fractionalization in topological minibands
• Interplay between topology and correlations in the second moiré band of twisted bilayer MoTe2
• Transfer learning relaxation, electronic structure and continuum model for twisted bilayer MoTe${}_2$
• Non-Abelian Fractional Quantum Anomalous Hall States and First Landau Level Physics in Second Moiré Band of Twisted Bilayer MoTe2
• Multiple Chern bands in twisted MoTe${}_2$ and possible non-Abelian states
• Higher Landau-Level Analogs and Signatures of Non-Abelian States in Twisted Bilayer MoTe${}_2$
• Giant proximity exchange and flat Chern band in 2D magnet-semiconductor heterostructures
• Intravalley spin-polarized superconductivity in rhombohedral tetralayer graphene
• Band Renormalization, Quarter Metals, and Chiral Superconductivity in Rhombohedral Tetralayer Graphene
• Superconductivity in twisted transition metal dichalcogenide homobilayers
• Evolution of Superconductivity in Twisted Graphene Multilayers
• Nematic, chiral and topological superconductivity in transition metal dichalcogenides
• Quantum Geometric Kohn-Luttinger Superconductivity
• Contrasting twisted bilayer graphene and transition metal dichalcogenides for fractional Chern insulators: an emergent gauge picture
• Experimental signature of layer skyrmions and implications for band topology in twisted WSe2 bilayers
• Parafermions in Moiré Minibands
• Resolving phonon-mediated superconducting pairing symmetries from first-principles calculation

Cited by in corpus (1)

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