Twisted bilayers of thin film magnetic topological insulators

Twisted bilayer graphene (TBG) near ``magic angles'' has emerged as a rich platform for strongly correlated states of two-dimensional (2D) Dirac semimetals. Here we show that twisted bilayers thin film magnetic topological insulators (MTIs) with large in-plane magnetization can realize flat bands 2D nodes. Using simple model films MTIs, derive continuum two such by small angle respect to each other. When the is in plane, interlayer tunneling terms act effective SU(2) vector potentials, which are known lead TBG. We changing magnetization, it possible tune MTI band dispersion quadratic touching or bands, similar If realized, this system be highly tunable phases