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

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.

14 pages, 5 figures

References in corpus (8)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Topological nodal line semimetals
• Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved Photoemission System with a Super-High Energy Resolution Better Than 1 meV
• Quantum Hall effect in a bulk antiferromagnet EuMnBi${}_2$ with magnetically confined two-dimensional Dirac fermions
• Nontrivial Berry phase in magnetic BaMnSb2 semimetal
• Observation of two-dimensional Fermi surface and Dirac dispersion in YbMnSb${}_2$
• Bulk quantum Hall effect of spin-valley-coupled Dirac fermions in a polar antiferromagnet BaMnSb${}_2$

Cited by in corpus (1)

• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$