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Imaging resonant dissipation from individual atomic defects in graphene

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Science  08 Dec 2017:
Vol. 358, Issue 6368, pp. 1303-1306
DOI: 10.1126/science.aan0877

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Watching electrons lose steam in graphene

Although graphene can be fabricated to be extremely clean, it still has a nonzero electrical resistance. Resistance is associated with turning electrons' energy into heat, but how exactly does this happen? Halbertal et al. used a tiny scanning temperature probe based on a superconducting quantum interference device to investigate this problem. As the current flowed through a square-shaped sample of graphene, electrons lost energy predominantly in the vicinity of atomic-scale defects, which were few and far between in the bulk but much more common on the edges of the sample.

Science, this issue p. 1303