The de Haas-van Alphen quantum oscillations in a three-dimensional Dirac semimetal TiSb2
- 6 April 2020
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 116 (14), 142103
- https://doi.org/10.1063/5.0001566
Abstract
Characterization of the Fermi surface of high-quality crystalline TiSb2 by de Hass-van Alphen measurement reveals nontrivial topological properties. Moreover, our analysis of the quantum oscillation frequencies associated with nonzero Berry phase when the magnetic field is parallel to both the ab-plane and c-axis of TiSb2 finds that the Fermi surface topology has a three-dimensional feature. The results are supported by first-principle calculations which reveal a symmetry-protected Dirac point along the Γ-Z high symmetry line near the Fermi level. On the (001) surface, the bulk Dirac points are found to project onto the point with nontrivial surface states. Our finding will substantially enrich the family of 3D Dirac semimetals which are useful for topological applications.
Funding Information
- National Key R&D Program of China (2018YFA0305800)
- Bureau of Industry and Information Technology of Shenzhen (201901161514)
- Natural Science Foundation of Shanghai (17ZR1443300)
- National Natural Science Foundation of China (11874264, 51772145)
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