Abstract

Our previous theory of the resonant photoemission spectra in black phosphorus is improved by using a more realistic density of states of conduction and valence bands and by taking account of the effect of a core hole potential. From comparison of the calculated spectra with recent experimental data, it is shown that a core exciton plays an important role both in Fano-type resonance and the enhancement of the Auger electron intensity at the core electron excitation threshold.

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