Electronic Structure Examination on the Topological Properties of CaMnSb$_{2}$ by Angle-Resolved Photoemission Spectroscopy
- Resource Type
- Working Paper
- Authors
- Rong, Hongtao; Zhou, Liqin; He, Junbao; Song, Chunyao; Huang, Jianwei; Hu, Cheng; Xu, Yu; Cai, Yongqing; Chen, Hao; Li, Cong; Wang, Qingyan; Zhao, Lin; Zhu, Zhihai; Liu, Guodong; Xu, Zuyan; Chen, Genfu; Weng, Hongming; Zhou, X. J.
- Source
- Phys. Rev. B 103, 245104(2021)
- Subject
- Condensed Matter - Materials Science
- Language
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.