Kitaev spin-orbital bilayers and their moiré superlattices

Emilian Marius Nica, Muhammad Akram, Aayush Vijayvargia, Roderich Moessner, Onur Erten

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We determine the phase diagram of a bilayer, Yao-Lee spin-orbital model with inter-layer interactions (J), for several stackings and moiré superlattices. For AA stacking, a gapped Z2 quantum spin liquid phase emerges at a finite Jc. We show that this phase survives in the well-controlled large-J limit, where an isotropic honeycomb toric code emerges. For moiré superlattices, a finite-q inter-layer hybridization is stabilized. This connects inequivalent Dirac points, effectively ‘untwisting’ the system. Our study thus provides insight into the spin-liquid phases of bilayer spin-orbital Kitaev materials.

Original languageEnglish (US)
Article number9
Journalnpj Quantum Materials
Issue number1
StatePublished - Dec 2023

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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