Experimentally Founded Charge Transport Model for Icosahedral Boron-Rich Solids

摘要: Charge transport in icosahedral boron-rich solids, particular boron carbide, has been controversially discussed. Theoretical band structure calculations, based on idealized instead of real structures, yield qualitatively wrong results; metallic semiconducting behavior consequence neglecting intrinsic structural defects. The theoretical bipolaron hypothesis is not compatible with numerous experimental results. In contrast, the actual energy schemes β-rhombohedral and carbide mainly derived from optical investigations allows consistent description most Electronic a superposition hopping-type band-type transport, whose share depends conditions antecedent.