Abstract
We provide a comparison of accurate full potential band calculations of the Fermi surfaces areas and masses of and with the de Haas–van Alphen data of Yelland et al. and Tanaka et al., respectively. The discrepancies in areas in can be removed by a shift of bands downward with respect to bands by 0.24 eV. Comparison of effective masses lead to orbit averaged electron-phonon coupling constants (both orbits), The required band shifts, which we interpret as an exchange attraction for states beyond local density band theory, reduces the number of holes from 0.15 to 0.11 holes per cell. This makes the occurrence of superconductivity in a somewhat closer call than previously recognized, and increases the likelihood that additional holes can lead to an increased
- Received 22 February 2002
DOI:https://doi.org/10.1103/PhysRevB.66.024521
©2002 American Physical Society