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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.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Twisted double trilayer graphene, lattice relaxation, moiré domains

刊行年月日: 2022-12-08

出版者: Springer Science and Business Media LLC

掲載誌:

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

研究助成金:

• U.S. Department of Energy DE-SC0012704

原稿種別: 出版者版 (Version of record)

MDR DOI:

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

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更新時刻: 2025-02-27 08:30:18 +0900

MDRでの公開時刻: 2025-02-27 08:30:18 +0900