Room temperature electrical conductivity of a highly two dimensional synthetic metal: AsF5-graphite

Compositional, structural and physical studies of some graphite hexafluoroarsenates and their relatives

“…,130° and another containing One end containing o 2 AsF 6 was kept at graphite at room temperature for [1][2][3][4][5][6][7][8][9][10][11][12][13][14] days. This type of reaction, after all, may be the same as the reaction (2.2) ,~…”

Structural Studies of Intercalants

“…There are several observations that support this argument. First, in the early work of PARRY and co-workers [1], in order to explain the intensity ratios of the graphite peaks in the disordered phase a contribution of 1/6 of a potassium atom over each carbon hexagon (2 carbon atoms per hexagon and 12 potassium atoms per layer) was required. Second, the extended x-ray absorption fine structure measurements of CASWELL et.…”

“…The atoms are then 'placed' on the chain by the flip of one of two coins. After choosing the first spacing, do by the flip of a coin, if d 0 = (n + Da then one uses a 'coin' with the probability of d x being (n+l)a equal to p 1 and na being q 1 -1 -p 1 . For d 0 r na a second 'coin' is used with probability, p, for d x s (n + l)a and q * 1 -p for d^ s na.…”

“…These systems have been of recent interst because of the high basal-plane conductivity and the highly two-dimensional nature of the electronic structure in some of these compounds [1]. Early x-ray structural studies on the stage 2 alkali metal compounds [2] MC^ (M =K,Rb, Cs) have shown the existence of an order-disorder transition.…”

Magnetotransport in carbon foils fabricated from exfoliated graphite

“…2 Upon separating the graphene sheets by acceptor-type intercalants, the conductivity anisotropy can be enhanced significantly to values as large as ϳ10 6 in AsF 5 stage-1 intercalated graphite. 5 Indeed, graphite intercalation compounds can be used to study dimensionality crossover phenomena, such as the warping of the cylindrical Fermi surface as disclosed by Shubnikov-de Haas oscillations in the magnetotransport data. 6 Another arresting physical phenomenon that has been reported for graphite-based materials is two-dimensional weak electron localization.…”