Nearly free electrons in the layered oxide superconductor Ag5Pb2O6.
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.
Sutherland
Mike
M
Cavendish Laboratory, University of Cambridge, United Kingdom.
Mann
Peter D A
PD
Bergemann
Christoph
C
Yonezawa
Shingo
S
Maeno
Yoshiteru
Y