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arXiv · 2106.13130

Unusual Electronic Structure of Dirac Material BaMnSb$_2$ Revealed by Angle-Resolved Photoemission Spectroscopy

Hongtao Rong·Liqin Zhou·Junbao He·Chunyao Song·Yu Xu·Yongqing Cai·Cong Li·Qingyan Wang·Lin Zhao·Guodong Liu·Zuyan Xu·Genfu Chen·Hongming Weng·X. J. Zhou
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Abstract

High resolution angle resolved photoemission measurements and band structure calculations are carried out to study the electronic structure of BaMnSb$_2$. All the observed bands are nearly linear that extend to a wide energy range. The measured Fermi surface mainly consists of one hole pocket around $\Gamma$ and a strong spot at Y which are formed from the crossing points of the linear bands. The measured electronic structure of BaMnSb$_2$ is unusual and deviates strongly from the band structure calculations. These results will stimulate further efforts to theoretically understand the electronic structure of BaMnSb$_2$ and search for novel properties in this Dirac material.

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Hongtao Rong, Liqin Zhou, Junbao He, Chunyao Song, Yu Xu, Yongqing Cai, Cong Li, Qingyan Wang, Lin Zhao, Guodong Liu, Zuyan Xu, Genfu Chen, Hongming Weng, X. J. Zhou. 2021-06-24. Unusual Electronic Structure of Dirac Material BaMnSb$_2$ Revealed by Angle-Resolved Photoemission Spectroscopy. https://doi.org/10.1088/1674-1056/ac0036

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