Abstract
Effects of hydrostatic pressure on electronic properties of acceptor-type intercalation compounds of graphite with HNO3 and SbCl5 have been studied. The c-axis compressibility of each compound shows characteristic behavior reflecting the structure of intercalant layer. The de Haas-van Alphen data reveal pressure-induced changes of the Fermi surface—slight swelling and distortion away from a cylindrical (two-dimensional) shape. The pressure dependence of the c-axis resistivity is much enhanced in intercalated samples compared with pristine graphite, as expected from sensitiveness of c-axis conduction to interlayer overlap. HNO3-compounds exhibit a resistivity anomaly around 5 kbar at room temperature, which is indicative of the onset of a structural phase transition.
