Observation of a flat band and bandgap in millimeter-scale twisted bilayer graphene

Keiju Sato; Naoki Hayashi; Takahiro Ito; Noriyuki Masago; Makoto Takamura; Mitsuru Morimoto; Takuji Maekawa; Doyoon Lee; Kuan Qiao; Jeehwan Kim; Keisuke Nakagahara; Katsunori Wakabayashi; Hiroki Hibino; Wataru Norimatsu

doi:10.1038/s43246-021-00221-3

Communications Materials (Dec 2021)

Observation of a flat band and bandgap in millimeter-scale twisted bilayer graphene

Keiju Sato,
Naoki Hayashi,
Takahiro Ito,
Noriyuki Masago,
Makoto Takamura,
Mitsuru Morimoto,
Takuji Maekawa,
Doyoon Lee,
Kuan Qiao,
Jeehwan Kim,
Keisuke Nakagahara,
Katsunori Wakabayashi,
Hiroki Hibino,
Wataru Norimatsu

Affiliations

Keiju Sato: Department of Materials Science and Engineering, Nagoya University
Naoki Hayashi: Department of Materials Science and Engineering, Nagoya University
Takahiro Ito: Synchrotron Radiation Research Center, Nagoya University
Noriyuki Masago: Research and Development Center, ROHM Co., Ltd.
Makoto Takamura: Research and Development Center, ROHM Co., Ltd.
Mitsuru Morimoto: Research and Development Center, ROHM Co., Ltd.
Takuji Maekawa: Research and Development Center, ROHM Co., Ltd.
Doyoon Lee: Department of Mechanical Engineering, Massachusetts Institute of Technology
Kuan Qiao: Department of Mechanical Engineering, Massachusetts Institute of Technology
Jeehwan Kim: Department of Mechanical Engineering, Massachusetts Institute of Technology
Keisuke Nakagahara: School of Science and Technology, Kwansei Gakuin University
Katsunori Wakabayashi: School of Science and Technology, Kwansei Gakuin University
Hiroki Hibino: School of Science and Technology, Kwansei Gakuin University
Wataru Norimatsu: Department of Materials Science and Engineering, Nagoya University

DOI: https://doi.org/10.1038/s43246-021-00221-3
Journal volume & issue: Vol. 2, no. 1
pp. 1 – 6

Abstract

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Magic-angle twisted bilayer graphene is interesting for its correlated superconducting and insulating states, but samples are typically micrometer-scale. Here, 3 × 5 mm2 twisted bilayer graphene samples are fabricated, exhibiting a flat band and large bandgap revealed by angle-resolved photoemission spectroscopy.

Published in Communications Materials

ISSN: 2662-4443 (Online)
Publisher: Nature Portfolio
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.nature.com/commsmat/

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