Angle-resolved photoemission spectra of a black-phosphorus single crystal have been measured with very high angular resolution using He I and Ne I resonance lines. The experimentally determined band structure has been compared with the self-consistent pseudopotential calculations. Some special points and bands with almost no energy dispersion along the interlayer direction have been successfully assigned in the experimentally derived band structure.
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Takahashi et al. (1984) studied this question.