Electronic Structure of Calcium as a Function of the Lattice Constant

Abstract
Energy bands, Fermi surfaces, and densities of states of calcium as a function of lattice constant have been calculated self-consistently by the augmented-plane-wave method. A comparison is made with other band calculations and photoemission and de Haas-van Alphen experiments. The calculation showed that calcium changes from a normal metal to a semimetal and back to a normal metal with decreasing lattice constant in agreement with high-pressure experiments.