{'fraction_non_alphanumeric': 0.026815642458100558, 'fraction_numerical': 0.008938547486033519, 'mean_word_length': 5.054054054054054, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Nature of Xenon adsorption on graphite: On-top versus hollow site preference

We study the interaction between Xe adatoms and the graphite (0001) surface employing all-electron density-functional theory calculations. Xe adatoms prefer to adsorb in the hollow site, which is consistent with a recent dynamical low-energy electron diffraction intensity analysis. We explain the hollow site preference as a consequence of the greater polarization of Xe adatoms at the hollow site, as well as of the surface C atoms, and hence a greater induced dipole moment, which provides a larger contribution to the attractive interaction. As a consequence, Xe adatoms get closer to the surface in the hollow site. The above-mentioned mechanisms of the interaction between Xe atoms and graphite (0001) are, thus, very similar to the picture recently proposed for rare-gas adatoms on close-packed metal surfaces.