The Effect of Hydrostatic Pressure on the Fermi Surfaces of Copper, Silver, and Gold. II. High Precision Studies

Abstract

New high precision measurements of the effect of hydrostatic pressure on six extremal cross sections of the Fermi surfaces of copper, silver, and gold are reported. The fluid-helium, de Haas – van Alphen phase-shift technique was used, and the results were of sufficient precision that valid Fourier expansion and phase-shift fits to the departures from linear scaling could be made. Contour stereograms show that in all cases the existing distortions from sphericity of the Fermi surface are increased. The results for changes of neck cross section are in agreement with previous figures for copper and gold, showing total rates of change 4.2 and 5.6 times scaling respectively, but the neck in silver is found to increase at about 10.6 times the scaling rate, in disagreement with an earlier figure of 7.3 times.