From Fractionalization to Chiral Topological Superconductivity in a Flat Chern Band

2025/06/12 by Daniele Guerci, Guerci, Daniele, Ahmed Abouelkomsan +3 · 4 citations
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #FOS: Physical sciences #Graphene research and applications #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #Topological Materials and Phenomena

paper · pdf · doi:10.48550/arxiv.2506.10938

openalex publication_date 2025/06/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show that interacting electrons in a flat Chern band can form, in addition to fractional Chern insulators, a chiral f-wave topological superconductor that hosts neutral Majorana fermion edge modes. Superconductivity emerges from an interaction-induced metallic state that exhibits anomalous Hall effect, as observed in rhombohedral graphene and near the ν=(2)/(3) fractional Chern insulator in twisted transition metal dichalcogenides.

Cited by

• Non-Abelian topological superconductivity from melting Abelian fractional Chern insulators
• A path to superconductivity via strong short-range repulsion in a spin-polarized band
• Superconductivity Proximate to Non-Abelian Fractional Spin Hall Insulator in Twisted Bilayer MoTe₂
• Pathways from a chiral superconductor to a composite Fermi liquid

Related

• Chiral superconductivity near a fractional Chern insulator
• Chiral superconductivity from parent Chern band and its non-Abelian generalization
• Non-Abelian topological superconductivity from melting Abelian fractional Chern insulators
• Coexistence of Chiral Majorana Edge States and Bogoliubov Fermi Surfaces in Two-Dimensional Nonsymmorphic Dirac Semimetal/Superconductor Heterostructures
• Signatures of unconventional superconductivity near reentrant and fractional quantum anomalous Hall insulators