Moiré Superconductivity with Spontaneous Vortex Lattice
ORAL
Abstract
Superconducting vortex lattices form in two-dimensional materials under external magnetic fields, with the number of vortices determined by the net magnetic flux piercing the sample. Here, we show that a moiré vortex lattice associated with a chiral f–if topological superconductor is spontaneously formed in the flat Chern bands of twisted bilayer heterostructures. In stark contrast to conventional vortex lattices induced by external magnetic fields, this moiré vortex lattice is driven by an internal emergent magnetic field generated by nontrivial layer-pseudospin skyrmion textures. Owing to the f–if pairing symmetry, the resulting vortex lattice hosts an unconventional topological flux pattern, where each vortex carries double vorticity.
*This material is based upon work supported by the Air Force Office of Scientific Research under award number FA2386-24-1-4043. The authors acknowledge the MIT SuperCloud and Lincoln Laboratory Supercomputing Center for providing computing resources that have contributed to the research results reported within this paper. A. A. was supported by the Knut and Alice Wallenberg Foundation (KAW 2022.0348). L. F. was supported in part by a Simons Investigator Award from the Simons Foundation.
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Publication:[1] D. Guerci*, A. Abouelkomsan*, L. Fu, From Fractionalization to Chiral Topological Superconductivity in Flat Chern Band, arXiv:2506.10938 (2025) (To appear in PRL as Editors Suggestion) [2] D. Guerci*, A. Abouelkomsan*, L. Fu, Moiré Superconductivity with Spontaneous Vortex Lattice, arXiv:25XX.XXXXX
