Two-dimensional ferromagnetic extension of a topological insulator
Philipp Kagerer, Celso I. Fornari, Sebastian Buchberger, T. Tschirner, Louis Veyrat, M. Kamp, A. Tcakaev, V. B. Zabolotnyy, Sérgio L. Morelhão, B. Geldiyev, Stefan Müller, Alexander Fedorov, E. D. L. Rienks, Pierluigi Gargiani, Manuel Valvidares, Laura Folkers, Anna Isaeva, B. Büchner, V. Hinkov, R. Claessen, Hendrik Bentmann, F. Reinert
Abstract
Ferromagnetic extension of a topological insulator is demonstrated in epitaxial heterostructures of the two-dimensional van der Waals magnet MnBi${}_{2}$Te${}_{4}$ and the topological insulator Bi${}_{2}$Te${}_{3}$. Angle-resolved photoelectron spectroscopy unambiguously demonstrates a large magnetic gap in the topological surface state.
Topics & Concepts
Topological insulatorFerromagnetismCondensed matter physicsInsulator (electricity)Topology (electrical circuits)X-ray photoelectron spectroscopyHeterojunctionvan der Waals forceEpitaxyMaterials sciencePhysicsQuantum mechanicsNanotechnologyOptoelectronicsNuclear magnetic resonanceMathematicsLayer (electronics)CombinatoricsMoleculeTopological Materials and PhenomenaGraphene research and applicationsAdvanced Condensed Matter Physics