Topological Semimetal Nanostructures: From Properties to Topotronics

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.

arXiv commentReview Article

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• Unconventional Resistivity Scaling in Topological Semimetal CoSi
• Progress in epitaxial thin-film Na3Bi as a topological electronic material
• Terahertz Polarization Conversion from Optical Dichroism in a Topological Dirac Semimetal
• Giant magnetoresistance, Fermi surface topology, Shoenberg effect and vanishing quantum oscillations in type-II Dirac semimetal candidates MoSi${}_2$ and WSi${}_2$
• Strain-gradient induced topological transition in bent nanoribbons of the Dirac semimetal Cd3As2
• Evidence of decoupling of surface and bulk states in Dirac semimetal $C{d}_{3}A{s}_2$
• 3D Topological Semimetal Phases of Strained $\alpha$-Sn on Insulating Substrate
• Room temperature spin-orbit torque efficiency in sputtered low-temperature superconductor delta-TaN
• Doping Topological Dirac Semimetal with magnetic impurities: electronic structure of Mn-doped Cd${}_3$As${}_2$
• Broadband photoresponse enhancement by band engineering in Sb-doped MnBi2Te4
• Ultimate charge transport regimes in doping-controlled graphene laminates: phonon-assisted processes revealed by the linear magnetoresistance
• Thermal-Field Electron Emission from Three-Dimensional Topological Semimetals
• Electronic structures and stability investigation of the new class of large band gap topological insulators MTl${}_4$Te${}_3$ (M = Cd, Hg)