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Flaky research

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  • Liesbeth Venema

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

  • Liesbeth Venema, 2007. "Flaky research," Nature, Nature, vol. 446(7131), pages 36-36, March.
    • Handle: RePEc:nat:nature:v:446:y:2007:i:7131:d:10.1038_446036a
    DOI: 10.1038/446036a
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