Electronic Structure Examination on the Topological Properties of CaMnSb${}_2$ by Angle-Resolved Photoemission Spectroscopy

Abstract

We have carried out detailed high resolution ARPES measurements and band structure calculations to study the electronic structure of CaMnSb${}_2$. The observed Fermi surface mainly consists of one hole pocket around $\Gamma$ point and one tiny hole pocket at Y point. Strong spectral weight accumulation along the $\Gamma$-X direction is observed on the hole-like Fermi surface around $\Gamma$ point, suggesting strong anisotropy of the density of states along the Fermi surface. The tiny hole pocket at Y point originates from an anisotropic Dirac-like band with the crossing point of the linear bands lying $\sim$ 10 meV above the Fermi level. These observations are in a good agreement with the band structure calculations. In addition, we observe additional features along the $\Gamma$-Y line that cannot be accounted for by the band structure calculations. Our results provide important information in understanding and exploration of novel properties in CaMnSb${}_2$ and related materials.

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Cited by in corpus (3)

• Observation of quantum oscillations, linear magnetoresistance, and crystalline electric field effect in quasi-two-dimensional PrAgBi${}_2$
• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$
• Spin waves in Dirac semimetal Ca${}_{0.6}$Sr${}_{0.4}$MnSb${}_2$ investigated with neutrons by the diffraction method