Antimony telluride (SbTe) has garnered significant attention within the condensed matter community, particularly as one of the earliest experimentally recognized topological insulators. However, despite substantial investigation, our understanding of the bulk electronic band structure of SbTe remains incomplete. Here, the authors employ a comprehensive experimental and theoretical approach integrating magneto-optical, optical, magnetotransport and techniques to examine SbTe. Their findings reveal that this material possesses a direct energy band gap at the center of the Brillouin zone, while also exhibiting additional low-energy band extrema in mirror planes.
