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説明:

We propose twisted homobilayer of a carbon allotrope, C568, to be a promising platform to realize a controllable square lattice single-band extended Hubbard model. This setup has the advantage of a widely tunable 𝑡′/𝑡 ratio without adding external fields, and the intermediate temperature 𝑡≪𝑇≪𝑈 regime can be easily achieved. We first analyze the continuum model obtained from symmetry analysis and first-principle calculations, and calculate the band structures. Subsequently, we derive the corresponding tight-binding models and fit the hopping parameters as well as the Coulomb interactions. When a displacement field is applied, anisotropic nearest-neighbor hoppings can further be achieved. If successfully fabricated, the device could be an important stepping stone towards understanding high-temperature superconductivity.

権利情報:

• In Copyright
  

  ©2025 American Physical Society

キーワード: 原子層物質, バンド構造, モアレ物質

刊行年月日: 2025-09-25

出版者: American Physical Society (APS)

掲載誌:

• PHYSICAL REVIEW B (ISSN: 1550235X) vol. 112 issue. 12 125159

研究助成金:

• Simons Foundation
• Japan Society for the Promotion of Science JP24K06968
• National Science Foundation PHY-2210452

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6071

公開URL: https://doi.org/10.1103/73rf-cw9d

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更新時刻: 2025-12-25 15:00:03 +0900

MDRでの公開時刻: 2025-12-25 16:19:25 +0900