Abstract
Topological materials have gained significant attention in condensed matter physics due to their unique electronic and transport properties. Three-dimensional (3D) topological materials are characterized by robust electronic states that are protected by symmetries and exhibit peculiar spin textures. They offer a rich platform for future information technology including spintronics and topological quantum computing. Here, we review the investigation by angle-resolved photoelectron spectroscopy (ARPES) of topological phases such as strong topological insulators, topological crystalline insulators, magnetic topological insulators, and 3D Dirac, Weyl, nodal, and chiral semimetals and address the status of correlated topological insulators and topological superconductors. A special emphasis is laid on examples from the transition metal dichalcogenide family. Moreover, insights from ultrafast pump-probe experiments are reviewed and a brief outlook is provided.
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