Nontrivial Berry's phase and exotic quantum phenomena in the vicinity of the quantum limit in the three-dimensional Dirac system Bi0.97Sb0.03

Nontrivial Berry's phase and exotic quantum phenomena in the vicinity of the quantum limit in the three-dimensional Dirac system Bi0.97Sb0.03

[Display omitted] •Quantum oscillations on the three-dimensional (3D) Dirac material Bi0.97Sb0.03 single crystals in pulsed magnetic fields up to 50 T with three possible orientations.•The anisotropic behaviors of the Landé g factor were deduced based on a detailed analysis of the observed Shubnikov...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Vol. 286; p. 116079
Main Authors: Salawu, Y.A., Sasaki, M., Yang, M., Wang, J.F., Hara, Y., Ohnishi, A., Kim, Heon-Jung
Format: Journal Article
Language:English
Published: Lausanne Elsevier B.V 01-12-2022
Elsevier BV
Subjects:
Alloy
Dirac semimetal
Electronic instability
Fermi surfaces
Magnetic fields
Nontrivial Berry's phase
Oscillations
Quantum phenomena
Shubnikov-de Haas oscillations
Single crystals
Topology
Transport propertie
Unusual quantum oscillations
Unusual quantum oscillations
Shubnikov-de Haas oscillations
Electronic instability
Transport propertie
Dirac semimetal
Nontrivial Berry's phase
Alloy
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Summary:[Display omitted] •Quantum oscillations on the three-dimensional (3D) Dirac material Bi0.97Sb0.03 single crystals in pulsed magnetic fields up to 50 T with three possible orientations.•The anisotropic behaviors of the Landé g factor were deduced based on a detailed analysis of the observed Shubnikov-de Haas (SdH) oscillations.•In the vicinity of the quantum limit, the Landau fan diagram from the oscillation data revealed a nontrivial Berry's phase.•Due to electronic instability, unusual quantum oscillations (UQO) were observed beyond the quantum limit under an extremely strong magnetic field. Quantum oscillations are known as the manifestation of the Fermi surface of metals in the presence of a strong magnetic field and of associated geometrical phases such as Berry's phase, playing a critical role in topological quantum materials. This study reports quantum oscillations on the three-dimensional (3D) Dirac material Bi0.97Sb0.03 single crystals in pulsed magnetic fields up to 50 T with three possible orientations. Under a magnetic field, we observe very pronounced Shubnikov-de Haas (SdH) oscillations originating from the Landau quantization of T-point holes. The SdH oscillations were well indexed with a large Landé g factor. The anisotropic behaviors of the Landé g factor were also deduced based on a detailed analysis of SdH oscillations. The Landau fan diagram revealed a nontrivial Berry's phase. Beyond the quantum limit (QL) under an extremely strong magnetic field, unusual quantum oscillations (UQO) were found. The possible origin of this phenomenon may be electronic instability caused by interactions. These results offer insights into the unusual electronic properties under the extremely strong fields caused by the unique band topology in this case.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2022.116079