Abstract

Interlayer rotational alignment in van der Waals (vdW) structures of two-dimensional (2D) materials couples strongly to electronic properties and, therefore, has significant technological implications. Nevertheless, controlling the rotation of an arbitrary 2D material flake remains a challenge in the development of rotation-tunable electronics, for the emerging field of twistronics. In this article, we reveal a general moire-driven mechanism that governs the interlayer rotation. Controlling the moire can therefore hold promise for controlling the interlayer rotation. We further demonstrate mismatch strain engineering as a useful tool to design the interlayer rotation via changing the energy landscape of moire within a finite-sized region. The robustness and programmable nature of our approach arise from moire symmetry, energetics, and mechanics. Our approach provides another possibility to the on-demand design of rotation-tunable electronics.

Original languageEnglish (US)
Pages (from-to)6925-6931
Number of pages7
JournalACS Nano
Volume13
Issue number6
DOIs
StatePublished - Jun 25 2019

Keywords

  • Two-Dimensional materials
  • interlayer rotation
  • moire
  • strain engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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