The de Haas-Van Alphen Effect in Calcium

Abstract

<p> The de Haas-van Alphen (dHvA) effect has been studied in single crystals of calcium using the modulation method in magnetic fields up to 55 kOe. Four distinct orbits were observed with dHvA frequency minima at the [110] or [100] directions. The results do not support calculations predicting a disconnected first-band Fermi surface for calcium. The dHvA data of crystalline calcium is consistent with the topology of the two-OPW model in which the first band is connected and pockets of electrons are about the point L of the second zone.</p>