ELECTRONIC-PROPERTIES OF CHLORIDE ACCEPTOR GRAPHITE-INTERCALATION COMPOUNDS WITH AUCL3

The de Haas-van Alphen (dHvA) effect is reported for the stage-1 and - 3 AuCl3 graphite intercalation compounds (GICs). The dHvA frequencies of the stage-3 GIC that are assigned to the graphite bands are 172, 63 8, and 908 T. There is also a low frequency oscillation of 128 T. The dominant dHvA oscillation for the stage-1 AuCl3 GIC appears at 1471 T and is assigned to the graphite band. There is also a group of oscilla tions centered at 450 T. A low frequency oscillation in the range 300- 600 T has been observed in other acceptor stage-1 GICs. The angular de pendence of the low frequency of the stage-1 SbF6--GIC shows that its corresponding Fermi surface piece has a spherical cross-section for 0 < Theta < 18 degrees, where Theta is the angle between the c-axis and the magnetic field direction. Comparisons are made to dHvA results of other acceptor GICs.