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Bipolar supercurrent in graphene

Author

Listed:
  • Hubert B. Heersche

    (Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands)

  • Pablo Jarillo-Herrero

    (Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands)

  • Jeroen B. Oostinga

    (Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands)

  • Lieven M. K. Vandersypen

    (Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands)

  • Alberto F. Morpurgo

    (Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands)

Abstract

Graphene's supercurrent Graphene has become a model system in condensed matter physics because its charge-carrying particles move at relativistic speeds, in effect behaving as if they are massless. This leads to some peculiar electron transport properties, like the one described in this issue. In a graphene layer sandwiched between two superconducting electrodes, a superconducting current flows at low temperatures. Current is carried either by electrons or by holes, depending on the gate voltage and hence charge density in the graphene layer. Interestingly, a finite supercurrent can flow even when the charge density is zero. These observations shed light on the relativistic phenomenon known as time-reversal symmetry, and on the nature of transport mechanisms in graphene.

Suggested Citation

  • Hubert B. Heersche & Pablo Jarillo-Herrero & Jeroen B. Oostinga & Lieven M. K. Vandersypen & Alberto F. Morpurgo, 2007. "Bipolar supercurrent in graphene," Nature, Nature, vol. 446(7131), pages 56-59, March.
    • Handle: RePEc:nat:nature:v:446:y:2007:i:7131:d:10.1038_nature05555
    DOI: 10.1038/nature05555
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    Cited by:

    1. Ko-Fan Huang & Yuval Ronen & Régis Mélin & Denis Feinberg & Kenji Watanabe & Takashi Taniguchi & Philip Kim, 2022. "Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Nikhil Tilak & Michael Altvater & Sheng-Hsiung Hung & Choong-Jae Won & Guohong Li & Taha Kaleem & Sang-Wook Cheong & Chung-Hou Chung & Horng-Tay Jeng & Eva Y. Andrei, 2024. "Proximity induced charge density wave in a graphene/1T-TaS2 heterostructure," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Tao Xu & Wei Sun & Shaowei Lu & Ke-ming Ma & Xiaoqiang Wang, 2019. "The real-time elderly fall posture identifying scheme with wearable sensors," International Journal of Distributed Sensor Networks, , vol. 15(11), pages 15501477198, November.
    4. Prasanna Rout & Nikos Papadopoulos & Fernando Peñaranda & Kenji Watanabe & Takashi Taniguchi & Elsa Prada & Pablo San-Jose & Srijit Goswami, 2024. "Supercurrent mediated by helical edge modes in bilayer graphene," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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