| Contactless Microwave Detection of Shubnikov–De Haas Oscillations in Three-Dimensional Dirac Semimetal ZrTe_5 |
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| 引用本文： | 武敏,张红伟,朱相德,陆建伟,郑国林,高文帅,韩玉岩,周建辉,宁伟,田明亮.Contactless Microwave Detection of Shubnikov–De Haas Oscillations in Three-Dimensional Dirac Semimetal ZrTe_5[J].中国物理快报,2019(6):49-52. |
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| 作者姓名： | 武敏 张红伟 朱相德 陆建伟 郑国林 高文帅 韩玉岩 周建辉 宁伟 田明亮 |
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| 基金项目： | Supported by the National Key Research and Development Program of China under Grant No 2016YFA0401003;the National Natural Science Foundation of China under Grant Nos 11774353,11574320,11374302,11804340,U1432251,U1732274;the Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology under Grant No 2018CXFX002;the China Postdoctoral Science Foundation under Grant No 2018M630718 |
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| 摘 要： | We report Shubnikov–de Haas(SdH)oscillations of a three-dimensional(3D) Dirac semimetal candidate of layered material ZrTe_5 single crystals through contactless electron spin resonance(ESR)measurements with the magnetic field up to 1.4 T.The ESR signals manifest remarkably anisotropic characteristics with respect to the direction of the magnetic field,indicating an anisotropic Fermi surface in ZrTe_5.Further experiments demonstrate that the ZrTe_5 single crystals have the signature of massless Dirac fermions with nontrivialBerry phase,key evidence for 3D Dirac/Weyl fermions.Moreover,the onset of quantum oscillation of our ZrTe_5 crystals revealed by the ESR can be derived down to 0.2 T,much smaller than the onset of SdH oscillation determined by conventional magnetoresistance measurements.Therefore,ESR measurement is a powerful tool to study the topologically nontrivial electronic structure in Dirac/Weyl semimetals and other topological materials with low bulk carrier density.
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| 关 键 词： | DIRAC MICROWAVE Haas ESR SPIN down tool our |
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