Engineering Dirac electrons emergent on the surface of a topological insulator

Yukinori Yoshimura, Koji Kobayashi, Tomi Ohtsuki, Ken Ichiro Imura

Research output: Contribution to journalReview article

1 Citation (Scopus)

Abstract

The concept of the topological insulator (TI) has introduced a new point of view to condensed-matter physics, relating a priori unrelated subfields such as quantum (spin, anomalous) Hall effects, spin-orbit coupled materials, some classes of nodal superconductors, superfluid 3He, etc. From a technological point of view, TIs are expected to serve as platforms for realizing dissipationless transport in a non-superconducting context. The TI exhibits a gapless surface state with a characteristic conic dispersion (a surface Dirac cone). Here, we review peculiar finite-size effects applicable to such surface states in TI nanostructures. We highlight the specific electronic properties of TI nanowires and nanoparticles, and in this context we contrast the cases of weak and strong TIs. We study the robustness of the surface and the bulk of TIs against disorder, addressing the physics of Dirac and Weyl semimetals as a new research perspective in the field.

Original languageEnglish
Article number014403
JournalScience and Technology of Advanced Materials
Volume16
Issue number1
DOIs
Publication statusPublished - 2015 Apr
Externally publishedYes

Keywords

  • Dirac monopole
  • Intrinsic Aharonov-Bohm effect
  • Perfectly conducting channel
  • Topological insulator
  • Weak topological insulator

ASJC Scopus subject areas

  • Materials Science(all)

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