Article Probing the Anisotropic Fermi Surface in Tetralayer Graphene via Transverse Magnetic Focusing

Illias Klanurak ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Sojiphong Chatraphorn ; Thiti Taychatanapat

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Illias Klanurak, Kenji Watanabe, Takashi Taniguchi, Sojiphong Chatraphorn, Thiti Taychatanapat. Probing the Anisotropic Fermi Surface in Tetralayer Graphene via Transverse Magnetic Focusing. Nano Letters. 2024, 24 (21), 6330-6336.
SAMURAI

Description:

(abstract)

Bernal-stacked tetralayer graphene (4LG) exhibits intriguing low-energy properties, featuring two massive subbands and showcasing diverse features of topologically dis- tinct, anisotropic Fermi surfaces, including Lifshitz transitions and trigonal warping. Here, we study the influence of the band structure on electron dynamics within 4LG us- ing transverse magnetic focusing. Our analysis reveals two distinct focusing peaks cor- responding to the two subbands. Furthermore, we uncover a pronounced dependence of the focusing spectra on crystal orientations, indicative of an anisotropic Fermi surface. Utilizing the semiclassical model, we attribute this orientation-dependent behavior to the trigonal warping of the band structure. This phenomenon leads to variations in electron trajectories based on crystal orientation. Our findings not only enhance our understanding of the dynamics of electrons in 4LG, but also offer a promising method for probing anisotropic Fermi surfaces in other materials.

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Keyword: Bernal-stacked tetralayer graphene, electron dynamics, transverse magnetic focusing

Date published: 2024-05-29

Publisher: American Chemical Society (ACS)

Journal:

  • Nano Letters (ISSN: 15306984) vol. 24 issue. 21 p. 6330-6336

Funding:

  • Thailand Toray Science Foundation
  • Ministry of Education, Culture, Sports, Science and Technology
  • National Research Council of Thailand
  • Japan Society for the Promotion of Science 20H00354
  • Japan Society for the Promotion of Science 23H02052
  • Chulalongkorn University N42A650266
  • National Science, Research and Innovation Fund Thailand B05F640152

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

MDR DOI:

First published URL: https://doi.org/10.1021/acs.nanolett.4c01133

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Updated at: 2025-02-14 16:30:57 +0900

Published on MDR: 2025-02-14 16:30:57 +0900

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