The de Haas-van Alphen effect of graphite-arsenic pentafluoride interacalation compounds

The de Haas-van Alphen (dHvA) effect in four different samples of graphite-arsenic pentafluoride (AsF₅) intercalation compounds is studied. Each sample with different stage number exhibits different series of dHvA periods. The observed dHvA periods are compared with a model calculation based on the graphite rigid band and supplemented with band folding due to the c-axis superlattice structure of intercalation compounds. From the comparison, the charge transfer from the intercalant to graphite band is estimated to be between 0.2 and 0.3 holes per AsF₅ molecule. It is also found that the charge transfer rate is slightly dependent on the stage number and is smaller for lower stage compounds.