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Direct observation of a widely tunable bandgap in bilayer graphene

Author

Listed:
  • Yuanbo Zhang

    (University of California at Berkeley)

  • Tsung-Ta Tang

    (University of California at Berkeley
    Present address: Department of Photonics and Institute of Electro-optical Engineering, National Chiao Tung University, Hsinchu, Taiwan 30010.)

  • Caglar Girit

    (University of California at Berkeley)

  • Zhao Hao

    (Lawrence Berkeley National Laboratory
    Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA)

  • Michael C. Martin

    (Lawrence Berkeley National Laboratory)

  • Alex Zettl

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory)

  • Michael F. Crommie

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory)

  • Y. Ron Shen

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory)

  • Feng Wang

    (University of California at Berkeley
    Lawrence Berkeley National Laboratory)

Abstract

Field-tunable bandgap in bilayer graphene The electronic bandgap of a material refers to an energy region where electrons are not 'allowed' to reside because of quantum mechanical considerations related to the symmetries and atomic constituents of the underlying crystal structure. It is a fundamental property of semiconductors and insulators and determines their electrical and optical response, which is why it is a crucial consideration in modern device physics and technologies. Ideally, the bandgap would be tunable by electric fields, which would allow great flexibility in device design and functionality. Until now electrical tunability has proved elusive, but now Zhang et al. demonstrate such a tunable bandgap in a bilayer-graphene-based device, spanning a spectral range from zero to mid-infrared.

Suggested Citation

  • Yuanbo Zhang & Tsung-Ta Tang & Caglar Girit & Zhao Hao & Michael C. Martin & Alex Zettl & Michael F. Crommie & Y. Ron Shen & Feng Wang, 2009. "Direct observation of a widely tunable bandgap in bilayer graphene," Nature, Nature, vol. 459(7248), pages 820-823, June.
    • Handle: RePEc:nat:nature:v:459:y:2009:i:7248:d:10.1038_nature08105
    DOI: 10.1038/nature08105
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    Cited by:

    1. Jincan Zhang & Xiaoting Liu & Mengqi Zhang & Rui Zhang & Huy Q. Ta & Jianbo Sun & Wendong Wang & Wenqing Zhu & Tiantian Fang & Kaicheng Jia & Xiucai Sun & Xintong Zhang & Yeshu Zhu & Jiaxin Shao & Yuc, 2023. "Fast synthesis of large-area bilayer graphene film on Cu," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Anna M. Seiler & Nils Jacobsen & Martin Statz & Noelia Fernandez & Francesca Falorsi & Kenji Watanabe & Takashi Taniguchi & Zhiyu Dong & Leonid S. Levitov & R. Thomas Weitz, 2024. "Probing the tunable multi-cone band structure in Bernal bilayer graphene," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Hadrien Duprez & Solenn Cances & Andraz Omahen & Michele Masseroni & Max J. Ruckriegel & Christoph Adam & Chuyao Tong & Rebekka Garreis & Jonas D. Gerber & Wister Huang & Lisa Gächter & Kenji Watanabe, 2024. "Spin-valley locked excited states spectroscopy in a one-particle bilayer graphene quantum dot," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    4. Yifan Zhu & Liyun Cao & Aurélien Merkel & Shi-Wang Fan & Brice Vincent & Badreddine Assouar, 2021. "Janus acoustic metascreen with nonreciprocal and reconfigurable phase modulations," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    5. Benjamin I. Weintrub & Yu-Ling Hsieh & Sviatoslav Kovalchuk & Jan N. Kirchhof & Kyrylo Greben & Kirill I. Bolotin, 2022. "Generating intense electric fields in 2D materials by dual ionic gating," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    6. Yiran Ding & Mengqi Zeng & Qijing Zheng & Jiaqian Zhang & Ding Xu & Weiyin Chen & Chenyang Wang & Shulin Chen & Yingying Xie & Yu Ding & Shuting Zheng & Jin Zhao & Peng Gao & Lei Fu, 2021. "Bidirectional and reversible tuning of the interlayer spacing of two-dimensional materials," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    7. Le Liu & Shihao Zhang & Yanbang Chu & Cheng Shen & Yuan Huang & Yalong Yuan & Jinpeng Tian & Jian Tang & Yiru Ji & Rong Yang & Kenji Watanabe & Takashi Taniguchi & Dongxia Shi & Jianpeng Liu & Wei Yan, 2022. "Isospin competitions and valley polarized correlated insulators in twisted double bilayer graphene," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    8. Kaining Yang & Xiang Gao & Yaning Wang & Tongyao Zhang & Yuchen Gao & Xin Lu & Shihao Zhang & Jianpeng Liu & Pingfan Gu & Zhaoping Luo & Runjie Zheng & Shimin Cao & Hanwen Wang & Xingdan Sun & Kenji W, 2023. "Unconventional correlated insulator in CrOCl-interfaced Bernal bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    9. Fabian R. Geisenhof & Felix Winterer & Anna M. Seiler & Jakob Lenz & Ivar Martin & R. Thomas Weitz, 2022. "Interplay between topological valley and quantum Hall edge transport," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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