Jorge I. Facio

TL;DR: It is demonstrated that the bulk Dirac bands arise from in-plane localized Fe-3 d orbitals, and evidence that the coexisting Dirac surface state realizes a rare example of fully spin-polarized two-dimensional Dirac fermions due to spin-layer locking in FeSn is identified.

TL;DR: In this paper, an antiferromagnetic single-layer kagome metal with spatially-decoupled KGome planes was examined using polarization and termination-dependent angle-resolved photoemission spectroscopy (ARPES) to detect the momentum-space signatures of coexisting flat bands and Dirac fermions in the vicinity of Fermi energy.

TL;DR: In this paper, a pressure-driven phase transition between topological and trivial insulators in three dimensions was observed in bismuth tellurium iodine, and it was shown that the Berry dipole has opposite orientations in the trivial and topological insulating phases and peaks at the insulator-to-Weyl critical points, at which the nonlinear Hall conductivity can increase by over 2 orders of magnitude.

TL;DR: In this paper, an antiferromagnetic topological insulator with an intrinsic net magnetization and ferromagnetic-like hysteresis was shown to have a topological surface state on the MnBi$_4$Te$_7$(0001) surface.