Abstract
We show for the first time the existence of quantum-well states in insulator (rare gas) layers as seen in angle-resolved 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 . The binding energies derived from the model are in good agreement with the experiment.
- Received 17 June 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.2595
©1995 American Physical Society