Graphene

Navigating through graphene

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Science  08 Sep 2017:
Vol. 357, Issue 6355, pp. 1012-1013
DOI: 10.1126/science.357.6355.1012-d

In some materials, current flow resembles the flow of viscous fluids. To reach this so-called hydrodynamic regime, researchers have to tune temperature to the right range. Krishna Kumar et al. studied the hydrodynamic flow of the electron liquid in graphene as it passed through narrow passages called constrictions. They found that the electrons flowed through the constrictions with a higher conductance than one would expect from noninteracting electrons; the electron-electron interactions helped the electron liquid avoid momentum loss from bumping into sample boundaries.

Nat. Phys. 10.1038/nphys4240 (2017).

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