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Letter

Nature Physics 3, 460–463 (1 July 2007) | doi:10.1038/nphys608

Acute enhancement of the upper critical field for superconductivity approaching a quantum critical point in URhGe

F. L|[eacute]|vy , I. Sheikin & A. Huxley

When a pure material is tuned to the point where a continuous phase-transition line is crossed at zero temperature, known as a quantum critical point (QCP), completely new correlated quantum ordered states can form. These phases include exotic forms of superconductivity.