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Zusammenfassung:
The 3p valence region of argon clusters has been investigated with photoemission near the photoionization
threshold. A strong feature between 14.6 and 15.3 eV binding energy shows a photon-energy dependence
indicative of electronic-energy band dispersion. A similar feature at approximately the same binding energy
and with a similar dispersion occurs in photoemission spectra of both the ordered and disordered solids. The
effect is already fully developed for scaling-law mean cluster sizes 〈N〉 of approximately 200 atoms, thus
showing an early onset of bulklike electronic properties.
