量子振荡
凝聚态物理
物理
几何相位
费米面
Dirac(视频压缩格式)
半金属
德哈斯-范阿尔芬效应
对称(几何)
表面状态
振荡(细胞信号)
拓扑(电路)
量子力学
曲面(拓扑)
化学
带隙
超导电性
几何学
中微子
组合数学
数学
生物化学
作者
Wei Xia,Xianbiao Shi,Yushu Wang,Wenna Ge,Hao Su,Qin Wang,Xia Wang,Na Yu,Zhiqiang Zou,Yufeng Hao,Weiwei Zhao,Yanfeng Guo
摘要
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 {\Gamma}-Z high symmetry line near the Fermi level. On the (001) surface, the bulk Dirac points are found to project onto the -{\Gamma} point with nontrivial surface states. Our finding will substantially enrich the family of 3D Dirac semimetals which are useful for topological applications.
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