Phase shift parametrization of the Fermi surfaces of the noble metals

The Fermi surfaces of copper, silver and gold are described in the KKRZ formalism with the phase shifts as parameters. The areas computed with this parametrization scheme are in very good agreement with the experimentally determined de Haas-van Alphen areas. It is demonstrated that the description of the Fermi surface geometry is independent of the Fermi energy and of Fourier components in the interstitial region. In addition, the dependence of the phase shifts and the Friedel sum on the Fermi energy is considered.