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28 March 2024
 
  » arxiv » 1412.0330

 Article overview


Anomalous Quantum Oscillations in 3D Dirac Semimetal Cd3As2 Induced by 3D Nested Anisotropic Fermi Surface
Yanfei Zhao ; Haiwen Liu ; Chenglong Zhang ; Huichao Wang ; Junfeng Wang ; Ziquan Lin ; Ying Xing ; Hong Lu ; Jun Liu ; Yong Wang ; Shuang Jia ; X. C. Xie ; Jian Wang ;
Date 1 Dec 2014
AbstractThe three-dimensional (3D) topological Dirac semimetal is a new topological phase of matter, viewed as the 3D analogy of graphene with a linear dispersion in the 3D momentum space. Here, we report the angular dependent magnetotransport in Cd3As2 single crystal and clearly show how the Fermi surface evolves when tilting the magnetic field. Remarkably, when the magnetic field lies in [112] and [11=i] axis, only single oscillation period features present, however, the system shows double period oscillations when the field is applied along [1=i0] direction. Moreover, tilting the magnetic field at certain direction also gives double period oscillations. We attribute the anomalous oscillation behavior to the sophisticated geometry of Fermi surface and illustrate a complete 3D Fermi surfaces with two nested anisotropic ellipsoids around the Dirac point. Additionally, a sub-millimeter mean free path at 6 K is observed in Cd3As2 crystal, indicating a large ballistic transport region in this material. These results improve the knowledge of the Dirac semimetal material Cd3As2, and also pave the way for proposing new electronic applications based on 3D Dirac materials.
Source arXiv, 1412.0330
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