Year: 2020
Type: article
Abstract: Characterization of the Fermi surface of high-quality crystalline TiSb2 by de Haas-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 Γ¯ point with nontrivial surface states. Our finding will substantially enrich the family of 3D Dirac semimetals which are useful for topological applications.
Source: Applied Physics Letters
DOI: 10.1063/5.0001566
Authors: Wei Xia, Xianbiao Shi, Yushu Wang, Wenna Ge, Hao Su, Qin Wang, Xia Wang, Na Yu, Zhiqiang Zou, Yufeng Hao, Weiwei Zhao, Yanfeng Guo
Institutions: Chinese Academy of Sciences, ShanghaiTech University, Shanghai Institute of Optics and Fine Mechanics, University of Chinese Academy of Sciences, Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Nanjing University, Zhengzhou University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3000787925