Electronic Structure and Properties of 2M WS₂

The recently observed Majorana Zero Mode (MZM) in 2M Phase of Tungsten Disulfide (2M WS₂) opens a new opportunity in the applications in quantum computing. The topologically protected quantum state can overcome issues such as decoherence and noise induced by local fluctuations to reduce the errors produced during computation by braiding the MZMs in topological superconductors. 2M WS₂ is a recently confirmed intrinsic topological superconductor with a high superconducting transition temperature of 8.8 K, which provides an excellent playground to explore the novel properties of the MZMs. In this work, we explore the electronic structure of 2M WS₂ using STM and angle resolved photoemission spectroscopy (ARPES). We observed defect/impurity induced doping, resulting in a ~10 meV shift in the dI/dV spectrum. We also observed a twisting distortion of ~8 degrees off the crystallographic axis in STM atomic resolution images. This twisting distortion has also been reported in other transition metal dichalcogenides (TMD)s, indicating this distortion might be a universal phenomenon in TMD materials. Finally, the preliminary ARPES data exhibits dispersive bands, qualitatively agreeing with the DFT calculated band structures.