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The electronic and structural properties of atomically thin materials can be controllably tuned by as- sembling them with an interlayer twist. During this process, constituent layers spontaneously rearrange themselves in search of a lowest energy configuration. Such relaxation phenomena can lead to unex- pected and novel material properties. Here, we study twisted double trilayer graphene (TDTG) using nano-optical and tunneling spectroscopy tools. We reveal a surprising optical and electronic contrast, as well as a stacking energy imbalance emerging between the moiré domains. We attribute this contrast to an unconventional form of lattice relaxation in which an entire graphene layer spontaneously shifts position during fabrication. We analyze the energetics of this transition and demonstrate that it is the result of a non-local relaxation process, in which an energy gain in one domain of the moiré lattice is paid for by a relaxation that occurs in the other.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Twisted double trilayer graphene, lattice relaxation, moiré domains

Date published: 2022-12-08

Publisher: Springer Science and Business Media LLC

Journal:

• Nature Communications (ISSN: 20411723) vol. 13 issue. 1 7587

Funding:

• U.S. Department of Energy DE-SC0012704

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1038/s41467-022-35213-5

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Updated at: 2025-02-27 08:30:18 +0900

Published on MDR: 2025-02-27 08:30:18 +0900