Topological Semimetal Nanostructures: From Properties to Topotronics.

ACS Nano

State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China.

Published: April 2020

AI Article Synopsis

  • Topological semimetals, featuring unique Dirac or Weyl cones and surface states, have become a hot topic in research due to their interesting quantum properties.
  • Nanostructures of these materials are particularly promising for developing advanced electronic devices because they can efficiently harness topological states.
  • The review discusses recent advancements in quantum transport, applications in electronic devices, and future directions, emphasizing the need for better synthesis and state manipulation techniques for practical applications in toptronics and quantum computing.

Article Abstract

Characterized by bulk Dirac or Weyl cones and surface Fermi-arc states, topological semimetals have sparked enormous research interest in recent years. The nanostructures, with large surface-to-volume ratio and easy field-effect gating, provide ideal platforms to detect and manipulate the topological quantum states. Exotic physical properties originating from these topological states endow topological semimetals attractive for future topological electronics (topotronics). For example, the linear energy dispersion relation is promising for broadband infrared photodetectors, the spin-momentum locking nature of topological surface states is valuable for spintronics, and the topological superconductivity is highly desirable for fault-tolerant qubits. For real-life applications, topological semimetals in the form of nanostructures are necessary in terms of convenient fabrication and integration. Here, we review the recent progresses in topological semimetal nanostructures and start with the quantum transport properties. Then topological semimetal-based electronic devices are introduced. Finally, we discuss several important aspects that should receive great effort in the future, including controllable synthesis, manipulation of quantum states, topological field effect transistors, spintronic applications, and topological quantum computation.

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Source
http://dx.doi.org/10.1021/acsnano.9b07990DOI Listing

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