Kabir, FirozaHosen, M. MofazzelDing, XiaxinLane, ChristopherDhakal, GyanendraLiu, YangyangDimitri, KlaussSims, ChristopherRegmi, SabinSakhya, Anup PradhanPersaud, LuisBeetar, John E.Liu, YongChini, MichaelPathak, Arjun K.Zhu, Jian-XinGofryk, KrzysztofNeupane, Madhab2021-12-182021-12-182021-12-182021-11-2510.3389/fmats.2021.706658https://infoscience.epfl.ch/handle/20.500.14299/183962WOS:000728959800001Three-dimensional (3D) topological insulator (TI) has emerged as a unique state of quantum matter and generated enormous interests in condensed matter physics. The surfaces of a 3D TI consist of a massless Dirac cone, which is characterized by the Z(2) topological invariant. Introduction of magnetism on the surface of a TI is essential to realize the quantum anomalous Hall effect and other novel magneto-electric phenomena. Here, by using a combination of first-principles calculations, magneto-transport and angle-resolved photoemission spectroscopy (ARPES), we study the electronic properties of gadolinium (Gd)-doped Sb2Te3. Our study shows that Gd doped Sb2Te3 is a spin-orbit-induced bulk band-gap material, whose surface is characterized by a single topological surface state. Our results provide a new platform to investigate the interactions between dilute magnetism and topology in magnetic doped topological materials.Materials Science, MultidisciplinaryMaterials Scienceangle resolved photoemission spectroscopy (arpes)magnetismtopologial insulatorgadolinium-dopeddopingdirac statedynamicssurfacefermionstatephasetext::journal::journal article::research article