Coulomb Blockade and Possible Luttinger Liquid Behaviors in Encapsulated High-Mobility Graphene Nanoribbons
Graphene nanoribbons (GNRs) are highly promising for exploring one-dimensional (1D) correlation physics and constructing digital logic circuits. Here, we report the intrinsic electrical transport behaviors of GNR field-effect transistors (FETs) fabricated using GNRs <i>in situ</i> encapsulated by hexagonal boron nitride (hBN) flakes. The FET devices exhibit excellent performance at room temperature: mobility up to ∼5000 cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup>, on/off ratio up to ∼10<sup>6</sup>, and subthreshold swing down to ∼70 mV dec<sup>-1</sup>. The devices exhibit periodic conductance peaks and regular Coulomb diamonds due to strong electron-electron repulsion at cryogenic temperatures. Additionally, conductance of the GNR devices exhibits power-law dependence and universal scaling, signatures of Luttinger liquid behaviors, with a tunable Luttinger parameter <i>g</i> ranging from 0.1 to 0.3. Our study demonstrates that the <i>in situ</i> encapsulated GNRs can function as both high-performance FET devices and strongly interacting 1D quantum systems, providing an ideal platform for studying 1D transport and correlated physics.
Authors
- Bosai Lyu (ORCID: https://orcid.org/0000-0001-8044-5509)
- Wei Yang (ORCID: https://orcid.org/0000-0002-3925-0352)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Zhenghan Wu
- Peiyue Shen (ORCID: https://orcid.org/0000-0002-6959-6354)
- Shuo Lou (ORCID: https://orcid.org/0000-0002-7367-8483)
- Dong Qian (ORCID: https://orcid.org/0000-0001-5891-8138)
- Yufeng Xie (ORCID: https://orcid.org/0009-0004-3005-6619)
- Zhi-Chun Zhang (ORCID: https://orcid.org/0009-0001-2427-2794)
- Zhiwen Shi (ORCID: https://orcid.org/0000-0002-3928-2960)
- S. Ma (ORCID: https://orcid.org/0009-0004-7408-9965)
- Yi Chen (ORCID: https://orcid.org/0000-0001-8564-3600)
- Guangyu Zhang (ORCID: https://orcid.org/0000-0003-1189-5324)
- Jiajun Chen (ORCID: https://orcid.org/0009-0007-2029-3823)
- Liguo Wang (ORCID: https://orcid.org/0000-0002-8034-9389)
- Guohua Wang (ORCID: https://orcid.org/0000-0002-8768-0605)
- Xianliang Zhou
- Kunqi Xu
- Qi Liang (ORCID: https://orcid.org/0000-0002-0201-9333)
Institutions
- University of Geneva (CH)
- Shanghai Jiao Tong University (CN)
- Chinese Academy of Sciences (CN)
- National Institute for Materials Science (JP)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-05-20
- DOI
- https://doi.org/10.1021/acs.nanolett.4c06064
- Citations
- 3
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 1.55
Funders
- National Natural Science Foundation of China
- Japan Society for the Promotion of Science
- National Key Research and Development Program of China