Feb 15, 2017
Superconducting bismuth raises questions
Bulk superconductivity has been observed in bismuth when it is cooled to a temperature below 0.53 mK at ambient pressure. The discovery, reported by S Ramakrishnan and colleagues of the Tata Institute of Fundamental Research in Mumbai, India, is a surprise because conventional Bardeen–Cooper–Schrieffer theory cannot explain it. Since the Debye temperature and the Fermi level are comparable in this system, something other than phonon-mediated pairing seems to be required.
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Compiled by John Swain, Northeastern University.
O Prakash et al. 2017 Science 355 52.