Toshikaze Kariyado
(National Institute for Materials Science)
;
Ashvin Vishwanath
;
Zhu-Xi Luo
Collection
Citation
Description:
(abstract)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.
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In Copyright
©2025 American Physical Society
Date published: 2025-09-25
Publisher: American Physical Society (APS)
Journal:
- PHYSICAL REVIEW B (ISSN: 1550235X) vol. 112 issue. 12 125159
Funding:
- Simons Foundation
- Japan Society for the Promotion of Science JP24K06968
- National Science Foundation PHY-2210452
Manuscript type: Author's version (Accepted manuscript)
MDR DOI: https://doi.org/10.48505/nims.6071
First published URL: https://doi.org/10.1103/73rf-cw9d
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Updated at: 2025-12-25 15:00:03 +0900
Published on MDR: 2025-12-25 16:19:25 +0900