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Giant magnetoresistance of Dirac plasma in high-mobility graphene

Author

Listed:
  • Na Xin

    (University of Manchester
    University of Manchester)

  • James Lourembam

    (University of Manchester)

  • Piranavan Kumaravadivel

    (University of Manchester
    University of Manchester)

  • A. E. Kazantsev

    (University of Manchester)

  • Zefei Wu

    (University of Manchester)

  • Ciaran Mullan

    (University of Manchester)

  • Julien Barrier

    (University of Manchester
    University of Manchester)

  • Alexandra A. Geim

    (University of Manchester)

  • I. V. Grigorieva

    (University of Manchester)

  • A. Mishchenko

    (University of Manchester)

  • A. Principi

    (University of Manchester)

  • V. I. Fal’ko

    (University of Manchester
    University of Manchester)

  • L. A. Ponomarenko

    (University of Lancaster)

  • A. K. Geim

    (University of Manchester
    University of Manchester
    National University of Singapore)

  • Alexey I. Berdyugin

    (University of Manchester
    University of Manchester
    National University of Singapore
    National University of Singapore)

Abstract

The most recognizable feature of graphene’s electronic spectrum is its Dirac point, around which interesting phenomena tend to cluster. At low temperatures, the intrinsic behaviour in this regime is often obscured by charge inhomogeneity1,2 but thermal excitations can overcome the disorder at elevated temperatures and create an electron–hole plasma of Dirac fermions. The Dirac plasma has been found to exhibit unusual properties, including quantum-critical scattering3–5 and hydrodynamic flow6–8. However, little is known about the plasma’s behaviour in magnetic fields. Here we report magnetotransport in this quantum-critical regime. In low fields, the plasma exhibits giant parabolic magnetoresistivity reaching more than 100 per cent in a magnetic field of 0.1 tesla at room temperature. This is orders-of-magnitude higher than magnetoresistivity found in any other system at such temperatures. We show that this behaviour is unique to monolayer graphene, being underpinned by its massless spectrum and ultrahigh mobility, despite frequent (Planckian limit) scattering3–5,9–14. With the onset of Landau quantization in a magnetic field of a few tesla, where the electron–hole plasma resides entirely on the zeroth Landau level, giant linear magnetoresistivity emerges. It is nearly independent of temperature and can be suppressed by proximity screening15, indicating a many-body origin. Clear parallels with magnetotransport in strange metals12–14 and so-called quantum linear magnetoresistance predicted for Weyl metals16 offer an interesting opportunity to further explore relevant physics using this well defined quantum-critical two-dimensional system.

Suggested Citation

  • Na Xin & James Lourembam & Piranavan Kumaravadivel & A. E. Kazantsev & Zefei Wu & Ciaran Mullan & Julien Barrier & Alexandra A. Geim & I. V. Grigorieva & A. Mishchenko & A. Principi & V. I. Fal’ko & L, 2023. "Giant magnetoresistance of Dirac plasma in high-mobility graphene," Nature, Nature, vol. 616(7956), pages 270-274, April.
  • Handle: RePEc:nat:nature:v:616:y:2023:i:7956:d:10.1038_s41586-023-05807-0
    DOI: 10.1038/s41586-023-05807-0
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    Citations

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    Cited by:

    1. Yiwen Zhang & Bo Xie & Yue Yang & Yueshen Wu & Xin Lu & Yuxiong Hu & Yifan Ding & Jiadian He & Peng Dong & Jinghui Wang & Xiang Zhou & Jianpeng Liu & Zhu-Jun Wang & Jun Li, 2024. "Extremely large magnetoresistance in twisted intertwined graphene spirals," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Lorenzo Rocchino & Federico Balduini & Heinz Schmid & Alan Molinari & Mathieu Luisier & Vicky Süß & Claudia Felser & Bernd Gotsmann & Cezar B. Zota, 2024. "Magnetoresistive-coupled transistor using the Weyl semimetal NbP," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Leonid A. Ponomarenko & Alessandro Principi & Andy D. Niblett & Wendong Wang & Roman V. Gorbachev & Piranavan Kumaravadivel & Alexey I. Berdyugin & Alexey V. Ermakov & Sergey Slizovskiy & Kenji Watana, 2024. "Extreme electron–hole drag and negative mobility in the Dirac plasma of graphene," Nature Communications, Nature, vol. 15(1), pages 1-6, December.

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