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February 2014 Volume 10 No 2

Chemical substitution often mimics the effects of applied pressure on a compound, and 'doping' is a standard way to reach a quantum critical point from a given phase. However, CeCoIn5 is a natural quantum critical superconductor, and Cd-doping tunes the system away from criticality. Applied pressure reverses the effect of doping, but although superconductivity is restored, quantum criticality is not. Letter p120; News & Views p94

IMAGE: NICHOLAS CURRO

COVER DESIGN: ALLEN BEATTIE

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