Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route

Peiyue Shen; Xianliang Zhou; Jiajun Chen; Aolin Deng; Bosai Lyu; Zhichun Zhang; Shuo Lou; Saiqun Ma; Binbin Wei; Zhiwen Shi

doi:10.1088/2752-5724/acbecd

Volume 2 Issue 1

March 2022

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Peiyue Shen, Xianliang Zhou, Jiajun Chen, Aolin Deng, Bosai Lyu, Zhichun Zhang, Shuo Lou, Saiqun Ma, Binbin Wei, Zhiwen Shi. Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route[J]. Materials Futures, 2023, 2(1): 015301. doi: 10.1088/2752-5724/acbecd

Citation:

Peiyue Shen, Xianliang Zhou, Jiajun Chen, Aolin Deng, Bosai Lyu, Zhichun Zhang, Shuo Lou, Saiqun Ma, Binbin Wei, Zhiwen Shi. Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route[J]. Materials Futures, 2023, 2(1): 015301. doi: 10.1088/2752-5724/acbecd

Citation:

Peiyue Shen, Xianliang Zhou, Jiajun Chen, Aolin Deng, Bosai Lyu, Zhichun Zhang, Shuo Lou, Saiqun Ma, Binbin Wei, Zhiwen Shi. Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route[J]. Materials Futures, 2023, 2(1): 015301. doi: 10.1088/2752-5724/acbecd

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Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route

Materials Futures, Volume 2, Number 1

Received Date: 2023-01-18
Accepted Date: 2023-02-24
Publish Date: 2023-03-07

Article information

doi: 10.1088/2752-5724/acbecd

1 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
3 Institute of System Engineering, Beijing 100191, People’s Republic of China

Funds:

This work is supported by the Open Research Fund of Songshan Lake Materials Laboratory (No. 2021SLABFK07), the National Key R&D Program of China (No. 2021YFA1202902), and the National Natural Science Foundation of China (No. 12074244). Z S acknowledges support from SJTU (21X010200846), and additional support from a Shanghai talent program.

Abstract

Abstract

ABC-stacked trilayer graphene has exhibited a variety of correlated phenomena owing to its relatively flat bands and gate-tunable bandgap. However, convenient methods are still lacking for identifying ABC graphene with nanometer-scale resolution. Here we demonstrate that the scanning near-field optical microscope working in ambient conditions can provide quick recognition of ABC trilayer graphene with no ambiguity and excellent resolution (∼20 nm). The recognition is based on the difference in their near-field infrared (IR) responses between the ABA and ABC trilayers. We show that in most frequencies, the response of the ABC trilayer is weaker than the ABA trilayer. However, near the graphene phonon frequency (∼1585 cm₋₁), ABC's response increases dramatically when gated and exhibits a narrow and sharp Fano-shape resonant line, whereas the ABA trilayer is largely featherless. Consequently, the IR contrast between ABC and ABA becomes reversed and can even be striking (ABC/ABA ∼ 3) near the graphene phonon frequency. The observed near-field IR features can serve as a golden rule to quickly distinguish ABA and ABC trilayers with no ambiguity, which could largely advance the exploration of correlation physics in ABC-stacked trilayer graphene.
- ABC trilayer graphene,
- identification,
- SNOM,
- nanoscale,
- Fano resonance

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References(45)

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