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.
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Experimental verification of Weyl nodes in Cobalt disulfide, in comparison to the theoretical prediction.
CREDIT
Princeton Department of Chemistry, Schoop Lab
Abstract:
Leading a collaboration of institutions in the U.S. and abroad, the Princeton University Department of Chemistry is reporting new topological properties of the magnetic pyrite Cobalt disulfide (CoS2) that expand our understanding of electrical channels in this long-investigated material.
New topological properties found in old material of Cobalt disulfide: For one thing, it s not a true half-metal
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IMAGE: Experimental verification of Weyl nodes in Cobalt disulfide, in comparison to the theoretical prediction. view more
Credit: Princeton Department of Chemistry, Schoop Lab
Leading a collaboration of institutions in the U.S. and abroad, the Princeton University Department of Chemistry is reporting new topological properties of the magnetic pyrite Cobalt disulfide (CoS2) that expand our understanding of electrical channels in this long-investigated material.
Using angle-resolved photoelectron spectroscopy and ab-initio calculations, researchers working with the Schoop Lab discovered the presence of Weyl nodes in bulk CoS2 that allow them to make predictions about its surface properties. The material hosts Weyl-fermions and Fermi-arc surface states within its band structure, which may enable it to serve as a platform for exotic phenomena and places it among materials candidates for use in spintronic devices.