1950/03/15 by S.G. Thompson, A. Ghiorso, G.T. Seaborg · 7 citations
Materials Science · Medicine · Engineering · #Graphite, nuclear technology, radiation studies #Occupational and environmental lung diseases #Nuclear and radioactivity studies
paper · pdf · doi:10.1103/physrev.77.838.2
openalex publication_date 1950/03/15 · openalex created_date 2022/05/12 · openalex updated_date 2026/06/26
NGLE graphite crystals are known to be good conductors along the graphite planes and very poor ones across (ratio of resistivities 104 or higher. ' Coulson' and Wallace' have shown that a graphite crystal along the planes is a semiconductor with zero activation energy, the only difference with a metal consisting in a decrease of the density of states to zero for both the filled and un6lled bands as one approaches their common limit. Although the tight binding approximation does not yield a completely satisfactory description of all the properties of a graphite crystal, the result mentioned seems well established. The theory is, however, developed only for the case of in6nitely large crystals.