Article Dry pick-and-flip assembly of van der Waals heterostructures for microfocus angle-resolved photoemission spectroscopy

Satoru Masubuchi ; Masato Sakano ; Yuma Tanaka ; Yusai Wakafuji ; Takato Yamamoto ; Shota Okazaki ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Jincai Li ; Hirotaka Ejima ; Takao Sasagawa ; Kyoko Ishizaka ; Tomoki Machida

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Satoru Masubuchi, Masato Sakano, Yuma Tanaka, Yusai Wakafuji, Takato Yamamoto, Shota Okazaki, Kenji Watanabe, Takashi Taniguchi, Jincai Li, Hirotaka Ejima, Takao Sasagawa, Kyoko Ishizaka, Tomoki Machida. Dry pick-and-flip assembly of van der Waals heterostructures for microfocus angle-resolved photoemission spectroscopy. Scientific Reports. 2022, 12 (1), 10936. https://doi.org/10.1038/s41598-022-14845-z
SAMURAI

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(abstract)

We present a dry pick-and-flip assembly technique for angle-resolved photoemission spectroscopy (ARPES) of van der Waals heterostructures. By combining Elvacite2552C acrylic resin and 1-ethyl-3-methylimidazolium ionic liquid, we prepared polymers with glass transition temperatures (Tg) ranging from 37 to 100 ยฐC. The adhesion of the polymer to the 2D crystals was enhanced at ๐‘ป๐ . By utilizing the difference in ๐‘ป๐ , a 2D heterostructure can be transferred from a high-๐‘ป๐  polymer to a lower-๐‘ป๐  polymer, which enables flipping its surface upside down. This process is suitable for assembling heterostructures for ARPES, where the top capping layer should be monolayer graphene. The laser-based micro-focused ARPES measurements of 5-layer WTe2, 3-layer MoTe2, 2-layer WTe2/few-layer Cr2Ge2Te6, and twisted double bilayer WTe2 demonstrate that this process can be utilized as a versatile sample fabrication method for investigating the energy spectra of 2D heterostructures.

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Keyword: Photoemission spectroscopy, van der Waals heterostructures, sample fabrica

Date published: 2022-06-29

Publisher: Springer Science and Business Media LLC

Journal:

  • Scientific Reports (ISSN: 20452322) vol. 12 issue. 1 10936

Funding:

  • Japan Society for the Promotion of Science JP19H01820
  • Japan Society for the Promotion of Science JP21K05235
  • Japan Society for the Promotion of Science JP21H05233
  • Japan Society for the Promotion of Science JP21H05236
  • Japan Society for the Promotion of Science JP20H00127
  • Core Research for Evolutional Science and Technology JPMJCR16F2
  • Core Research for Evolutional Science and Technology JPMJCR15F3
  • JST-Mirai Program JPMJMI21G9

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

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First published URL: https://doi.org/10.1038/s41598-022-14845-z

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Updated at: 2025-02-28 16:31:09 +0900

Published on MDR: 2025-02-28 16:31:09 +0900

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