Moiré $M$-valley bilayers: quasi-one-dimensional physics, unconventional spin textures and twisted van Hove singularities

Julian Ingham, Mathias S. Scheurer, Harley D. Scammell

Motivated by the discovery of quasi-two-dimensional kagome metals AV${}_3$Sb${}_5$, we consider the theory of twisted bilayers in which the Fermi surface is near the $M$-point. Surpris…