Effects of spin-orbit coupling in a valley chiral kagome network

Chern mosaic systems exhibit weakly protected chiral modes propagating in the bulk of the material. This novel phase of matter has recently been found in twisted bilayer graphene and double-aligned graphene-hexagonal boron nitride. Here, the authors investigate the spectrum and transport properties of a valley chiral kagome scattering network. The interplay of the network geometry, magnetic field, and spin-orbit coupling gives rise to peculiar interference phenomena, including a sizable zero-field spin polarization of the conductance.