Robust three-dimensional type-II Dirac semimetal state in SrAgBi

Topological semimetals such as Dirac, Weyl or nodal line semimetals are widely studied for their peculiar properties including high Fermi velocities, small effective masses and high magnetoresistance. When the Dirac cone is tilted, exotic phenomena could emerge whereas materials hosting such states...

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Bibliographic Details
Published in:npj quantum materials 2023-05, Vol.8 (1), p.20-20, Article 20
Main Authors: Hu, Zhixiang, Deng, Junze, Li, Hang, Ogunbunmi, Michael O., Tong, Xiao, Wang, Qi, Graf, David, Pudełko, Wojciech Radoslaw, Liu, Yu, Lei, Hechang, Bobev, Svilen, Radovic, Milan, Wang, Zhijun, Petrovic, Cedomir
Format: Article
Language:English
Subjects:
639/301/119/995
639/766/119/2792/4128
Condensed Matter Physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Electrons
Fermi surfaces
Laboratories
Magnetic fields
Magnetic properties
Magnetoresistance
Magnetoresistivity
Materials science
Metalloids
Physics
Physics and Astronomy
Quantum phenomena
Quantum Physics
Robustness
Spin-orbit interactions
Structural Materials
Surface properties
Surfaces and Interfaces
Symmetry
Thin Films
Topology
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Summary:Topological semimetals such as Dirac, Weyl or nodal line semimetals are widely studied for their peculiar properties including high Fermi velocities, small effective masses and high magnetoresistance. When the Dirac cone is tilted, exotic phenomena could emerge whereas materials hosting such states are promising for photonics and plasmonics applications. Here we present evidence that SrAgBi is a spin-orbit coupling-induced type-II three-dimensional Dirac semimetal featuring tilted Dirac cone at the Fermi energy. Near charge compensation and Fermi surface characteristics are not much perturbed by 7% of vacancy defects on the Ag atomic site, suggesting that SrAgBi could be a material of interest for observation of robust optical and spintronic topological quantum phenomena.
ISSN:2397-4648
2397-4648
DOI:10.1038/s41535-023-00549-8