Spin-Triplet Paired Wigner Crystal Stabilized by Quantum Geometry
Phys. Rev. Lett. 137, 036506 – Published 17 July, 2026
DOI: https://doi.org/10.1103/ksxq-1l4q
Abstract
We have used variational states to analyze the effects of band geometry on the two-dimensional Wigner crystal with one and two electrons per unit cell. At sufficiently low electron densities, we find that increasing Berry curvature drives a transition into a crystalline state composed of spin-triplet pairs carrying relative orbital angular momentum . The essential features of this transition are captured by an effective two-electron quantum dot problem in the presence of Berry curvature. Our results point to a purely electronic, strong-coupling mechanism for local spin-triplet pairing in correlated two-dimensional electron systems with quantum geometry.