Atom-surface band structure and bound-state resonances a theoretical study
Por:
Vargas M.C., Mochán W.L.
Publicada:
1 ene 1998
Resumen:
The energy bands of an atom adsorbed on a crystalline surface have been calculated for representative hypothetical systems. The corrugation corresponding to the atom - surface interaction potential of several of the studied systems is similar to the corrugation reported for systems in which the surface holds a layer of adsorbed particles. Characteristic features of the band structure, that depend on the corrugation of the atom - surface interaction potential and on the depth of the associated bound-state, have been found. The bands of all the systems evolve to parabolic shaped bands displaced downwards with respect to the corresponding free-atom parabolic bands. Theoretical studies of atom - surface elastic scattering revealed that bound-state resonances do not appear if the energy of the incident atoms is not high enough to reach the region where the band is parabolic. © 1998 Elsevier Science B.V. All rights reserved.
Filiaciones:
Vargas M.C.:
Departamento de Física, Cinvestav del IPN U. Mérida, Apdo. Postal 73, Cordemex, 97310 Mérida, Mexico
Mochán W.L.:
Instituto de Física, Univ. Nac. Autonoma de Mexico, Apdo. Postal 48-3, 62251 Cuernavaca, Mexico
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