Van Hove singularities of some icosahedral boron-rich solids by differential reflectivity spectra

• A simplified method to obtain derivative reflectivity spectra is described.
• Van Hove singularities in electronic states of β-rhomb. B, B4.3C and YB66 are determined.
• The results agree satisfactorily with interband transitions determined by other methods.

Differential reflectivity spectra of some icosahedral boron rich solids, β-rhombohedral boron, boron carbide and YB66-type crystals, were measured. The derivatives yield the van Hove singularities, which are compared with results obtained by other experimental methods.

Figure optionsDownload as PowerPoint slide