✍ Scribed by H. Werheit; R. Schmechel; K. Kimura; R. Tamura; T. Lundström
No coin nor oath required. For personal study only.
Optical conductivities and dielectric functions derived from the IR-optical reflectivity spectra exhibit clear similarities between icosahedral boron-rich structures and Al-based isosahedral quasicyrstals. This suggests a close qualitative relationship of their electronic structures. Accordingly icosahedral quasicrystals are assumed to be semiconductors with complex band structures qualitatively related to those of boron-rich solids, which are essentially determined by electron-phonon interactions.
📜 SIMILAR VOLUMES
For -rhombohedral boron and boron carbide, the hitherto best-investigated icoasahedral boron-rich solids, the concentrations of structural defects and electronic gap states are quantitatively correlated. In this way the theoretically determined valence electron de5ciencies are exactly compensated, a
The dielectric function of the boron-rich solids in the FIR range is analyzed on the basis of their optical reflectivity spectra, which exhibit obviously typical, strongly increasing slopes with decreasing frequencies. It is shown that these slopes can be quantitatively described, when a superpositi