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Efectos de la repulsión coulombiana entre electrones localizados en la interacción entre átomos y superficies

Adalberto De Jesús Iglesias García Adalberto de Jesús Iglesias García Edith Catalina Goldberg María Silvia Gravielle Ana María LLois Alejandra Elisa Martinez Evelina Andrea García

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Resumen/Descripción – provisto por el repositorio digital
We studied, in this work, the charge exchange between atoms and surfaces involved in the dynamical collision process by using the theoretical frame provided by the Anderson model. The effect of the fine details of the electronic band structure (surface energy gaps, surface states) on the charge exchange process is analyzed within a localized description, and different approximations to the Coulomb repulsion in the atom site are discussed. The projector language is used for introducing the atomic configurations which have an appreciable probability of occurrence in the atom-surface interaction. The dynamical evolution of the interacting system is described by appropriate Green-Keldysh functions, and these ones are solved by means of the Equation of Motion method. The Anderson Hamiltonian parameters are obtained from an abinitio model calculation that takes into account the chemical properties of the involved atoms.
Palabras clave – provistas por el repositorio digital

ion surface scattering; charge exchange; surface energy gaps; excited configurations; electronic correlation; Anderson model; Dispersión de iones por superficies; transferencia de carga; gaps superficiales; estados excitados; correlación eléctronica; modelo de Anderson

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No requiere 2013 Biblioteca Virtual de la Universidad Nacional del Litoral (SNRD) acceso abierto

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Tipo de recurso:

tesis

Idiomas de la publicación

  • español castellano

País de edición

Argentina

Fecha de publicación