Crystal Potentials and the Fermi Surface of the Alkali Metals. II

Abstract

Radial distortions of the Fermi surface are evaluated for K and Rb by APW method. The Hartree-Fock-Slater potential, the Wigner-Seitz potential, and the Hedin potential, which were used to evaluate the radial distortion of the Fermi surface of K and Rb in a previous paper, are now modified to be l -dependent in order to obtain a good agreement between the calculated and the observed Fermi surface. It is found that very slight modification of the potential is sufficient to have an excellent agreement.