论文标题
三维狄拉克半学TISB2中的De Hass-Van Alphen量子振荡
The de Hass-van Alphen quantum oscillations in a three-dimensional Dirac semimetal TiSb2
论文作者
论文摘要
我们已经使用了De Hass-Van Alphen（DHVA）效应来研究高质量晶体TISB2的费米表面，该表面通过分析DHVA量子振荡来揭示了非平凡的拓扑性质。此外，当磁场与TISB2的AB平面和C轴平行时，我们对与非零浆果相关的量子振荡频率的分析发现，Fermi表面拓扑具有三维（3D）特征。结果得到了第一原则计算的支持，该计算揭示了沿费米水平附近的γ-Z高对称线出现了对称性保护的越野点。在（001）表面上，发现散装零点可以在-γ点上以非平凡的表面状态投射。我们的发现将大大丰富3D Dirac半学的家族，这对拓扑应用有用。
We have used the de Hass-van Alphen (dHvA) effect to investigate the Fermi surface of high-quality crystalline TiSb2, which unveiled a nontrivial topologic nature by analyzing the dHvA quantum oscillations. Moreover, our analysis on the quantum oscillation frequencies associated with nonzero Berry phase when the magnetic field is parallel to both of the ab-plane and c-axis of TiSb2 finds that the Fermi surface topology has a three-dimensional (3D) feature. The results are supported by the first-principle calculations which revealed a symmetry-protected Dirac point appeared 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.
