We show for the first time the existence of quantum-well states in insulator (rare gas) layers as seen in angle-resolved Xe(5p) uv (He I) photoelectron spectra of up to ten adsorbed Xe layers on a Pt(100) substrate. The number of states correlates with the number of Xe layers in the thin homogeneous Xe crystal (beyond the first, strongly polarized adlayer). In a pure initial state tight-binding model the quantum-well states are related to bulk-band states with quantized normal momentum k_⊥. The binding energies derived from the model are in good agreement with the experiment.
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Schmitz‐Hübsch et al. (1995) studied this question.
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