English

Single-component twisted $\mathbb{Z}_3$ orthogonal metal in an $e/3$-anyon fluid

Strongly Correlated Electrons 2026-07-16 v1

Abstract

We propose an unconventional metallic phase emerging on doping the 1/31/3 Fractional Chern insulator, which can serve as a parent state to anyon superconductivity with arbitrary chiral central charge. It is a twisted Z3\mathbb{Z}_3 orthogonal metal: a state with vanishing electron quasiparticle weight but a single well-defined Fermi surface of emergent charge-e/3e/3 fermions coupled to a Dijkgraaf-Witten twisted Z3\mathbb{Z}_3 gauge field. It is manifestly valley-symmetric and valley-gapped. Pairing this fractionalized Fermi surface then removes the topological order and produces a family of superconductors whose chiral central charge is directly set by the BdG band topology of the paired e/3e/3 fermions, while the angular momentum of the physical order parameter is constrained to be a multiple of three. This scenario provides a route to superconducting states beyond anyon-superconductivity constructions based on 2e/32e/3 anyons. The metallic phase itself carries distinctive ``fractional Fermiology'' signatures: e/3e/3 shot noise, anomalous quantum oscillations, and a 6π6\pi ac Josephson effect when it mediates the Josephson coupling between superconductors. We construct explicit wavefunction ansatz realizing the phase, and argue that inter-valley repulsion between anyons stabilizes this phase compared to competing states. We show that the construction extends to higher Laughlin states but not to Jain states.

Keywords

Cite

@article{arxiv.2607.15274,
  title  = {Single-component twisted $\mathbb{Z}_3$ orthogonal metal in an $e/3$-anyon fluid},
  author = {Zhaoyu Han and Ashvin Vishwanath and Eslam Khalaf},
  journal= {arXiv preprint arXiv:2607.15274},
  year   = {2026}
}