Researchers Identify Novel Topological Properties in Cobalt Disulfide Written by AZoMDec 21 2020 The Schoop Lab, which is heading an association of institutions both in the United States and overseas, has reported unexpected new topological characteristics of cobalt disulfide (CoS 2)—a magnetic pyrite—expanding one’s interpretation of electrical channels in this extensively 2, in comparison to the theoretical prediction. Image Credit: Figure courtesy of the Schoop Lab. The researchers used ab-initio calculations and angle-resolved photoelectron spectroscopy and observed that bulk CoS 2 contains Weyl nodes. These Weyl nodes enabled the team to make predictions about the surface properties of this material. Within its band structure, the material contains Weyl-fermions and Fermi-arc surface states, which may allow it to act as a platform for unusual phenomena and also places it among materials candidates for applications in spintronic devices.