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Abstract
Topological semimetals are well known for the linear energy band dispersion in the bulk state and topologically protected surface state with arc-like Fermi surface. The angle resolved photoemission spectroscopy experiments help confirm the existence of linear Dirac (Weyl) cone and Fermi arc. Meantime, the transport experiments are very important for its intimate relationship with possible applications. In this concise review, recent developments of quantum transport in two typical topological semimetals, namely Dirac and Weyl semimetals, are described. The 3D Dirac semimetal phase is revealed by the Shubnikov–de Haas oscillations. The Weyl Fermions-related chiral anomaly effect is evident by negative magnetoresistance, thermal power suppression, and nonlocal measurements. The Fermi arc mechanism is discussed and several corresponding transport evidences have been described. The point contact-induced superconductivity in Dirac and Weyl semimetal is also introduced. Perspectives about the development of topological semimetals and topological superconductors are provided.
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Details
1 State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, China
2 Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
3 State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, China; Department of Physics, Institute for Quantum Science and Engineering, South University of Science and Technology of China, Shenzhen, China
4 State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, China; Collaborative Innovation Center of Quantum Matter, Beijing, China