TY - JOUR
T1 - Kitaev spin-orbital bilayers and their moiré superlattices
AU - Nica, Emilian Marius
AU - Akram, Muhammad
AU - Vijayvargia, Aayush
AU - Moessner, Roderich
AU - Erten, Onur
N1 - Funding Information:
We thank Piers Coleman and Filip Ronning for fruitful discussions. OE acknowledge support from NSF Award No. DMR 1904716. MA is supported by Fulbright Scholarship. This work was in part supported by the Deutsche Forschungsgemeinschaft under grants SFB 1143 (project-id 247310070) and the cluster of excellence ct.qmat (EXC 2147, project-id 390858490).
Publisher Copyright:
© 2023, The Author(s).
PY - 2023/12
Y1 - 2023/12
N2 - 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.
AB - 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.
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U2 - 10.1038/s41535-023-00541-2
DO - 10.1038/s41535-023-00541-2
M3 - Article
AN - SCOPUS:85148462897
SN - 2397-4648
VL - 8
JO - npj Quantum Materials
JF - npj Quantum Materials
IS - 1
M1 - 9
ER -