"Oxygen-pump" measurements of the electron state density at the Fermi level in YBa2Cu3O7-δ
Gerbshtein Yu. M. , Chudnovskii F. A. , Andreev V. N. , Kuz'min A. K. , Timoshchenko N. E., Shokhor S. L.
A peak in the electron state density associated with a structural phase transition has been observed near the Fermi level in a YBa2 Cu3 07 δ high-temperature superconductor.