Electronic structure of red amorphous phosphorus studied by X-ray spectroscopy

A SXS study of occupied and unoccupied 3p states of semiconducting red amorphous phosphorus is presented. It is shown that in the upper part of the valence band, partially hybridized sp spates are present among p pure states, whereas the bottom of the valence band is almost s-like. The results are discussed in connection with theoretical data available for black phosphorus.