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Nearly free electrons in the layered oxide superconductor Ag5Pb2O6
Mike Sutherland1, Peter D A Mann, Christoph Bergemann
1Cavendish Laboratory, University of Cambridge, United Kingdom.
Abstract:
We present first measurements of quantum oscillations in the layered oxide superconductor Ag5Pb2O6. From a detailed angular and temperature dependent study of the de Haas-van Alphen effect we determine the electronic structure and demonstrate that the electron masses are very light, m* approximately 1.2me. The Fermi surface we observe is essentially that expected of nearly free electrons--establishing Ag5Pb2O6 as the first known example of a monovalent, nearly free electron superconductor at ambient pressure.
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