PerspectiveQuantum Mechanics

Look but don't touch the metals

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Science  06 Mar 2015:
Vol. 347, Issue 6226, pp. 1073-1074
DOI: 10.1126/science.aaa6908

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Summary

Metallic conductivity is a familiar phenomenon, but metals can display surprising and exotic behavior, such as superconductivity and the quantum Hall effect. Advances in nanotechnology have led to new questions about how metallic conductivity might change in structures with dimensions approaching a few atoms. On page 1129 of this issue, Kolkowitz et al. (1) provide us with another tool for answering these questions: a magnetic sensor based on atomic defects in diamond.