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Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice

The electronic and structural properties of atomically thin materials can be controllably tuned by assembling 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 un...

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Autores principales: Halbertal, Dorri, Turkel, Simon, Ciccarino, Christopher J., Hauck, Jonas B., Finney, Nathan, Hsieh, Valerie, Watanabe, Kenji, Taniguchi, Takashi, Hone, James, Dean, Cory, Narang, Prineha, Pasupathy, Abhay N., Kennes, Dante M., Basov, D. N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9731949/
https://www.ncbi.nlm.nih.gov/pubmed/36481831
http://dx.doi.org/10.1038/s41467-022-35213-5
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author Halbertal, Dorri
Turkel, Simon
Ciccarino, Christopher J.
Hauck, Jonas B.
Finney, Nathan
Hsieh, Valerie
Watanabe, Kenji
Taniguchi, Takashi
Hone, James
Dean, Cory
Narang, Prineha
Pasupathy, Abhay N.
Kennes, Dante M.
Basov, D. N.
author_facet Halbertal, Dorri
Turkel, Simon
Ciccarino, Christopher J.
Hauck, Jonas B.
Finney, Nathan
Hsieh, Valerie
Watanabe, Kenji
Taniguchi, Takashi
Hone, James
Dean, Cory
Narang, Prineha
Pasupathy, Abhay N.
Kennes, Dante M.
Basov, D. N.
author_sort Halbertal, Dorri
collection PubMed
description The electronic and structural properties of atomically thin materials can be controllably tuned by assembling 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 unexpected 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 assembly, resulting in domains of ABABAB and BCBACA stacking. 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.
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spelling pubmed-97319492022-12-10 Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice Halbertal, Dorri Turkel, Simon Ciccarino, Christopher J. Hauck, Jonas B. Finney, Nathan Hsieh, Valerie Watanabe, Kenji Taniguchi, Takashi Hone, James Dean, Cory Narang, Prineha Pasupathy, Abhay N. Kennes, Dante M. Basov, D. N. Nat Commun Article The electronic and structural properties of atomically thin materials can be controllably tuned by assembling 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 unexpected 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 assembly, resulting in domains of ABABAB and BCBACA stacking. 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. Nature Publishing Group UK 2022-12-08 /pmc/articles/PMC9731949/ /pubmed/36481831 http://dx.doi.org/10.1038/s41467-022-35213-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Halbertal, Dorri
Turkel, Simon
Ciccarino, Christopher J.
Hauck, Jonas B.
Finney, Nathan
Hsieh, Valerie
Watanabe, Kenji
Taniguchi, Takashi
Hone, James
Dean, Cory
Narang, Prineha
Pasupathy, Abhay N.
Kennes, Dante M.
Basov, D. N.
Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title_full Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title_fullStr Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title_full_unstemmed Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title_short Unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
title_sort unconventional non-local relaxation dynamics in a twisted trilayer graphene moiré superlattice
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9731949/
https://www.ncbi.nlm.nih.gov/pubmed/36481831
http://dx.doi.org/10.1038/s41467-022-35213-5
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