Band-structure-based collisional model for electronic excitations in ion-surface collisions

Energy loss per unit path in grazing collisions with metal surfaces is studied by using the collisional and dielectric formalisms. Within both theories we make use of the band-structure-based (BSB) model to represent the surface interaction. The BSB approach is based on a model potential and provide...

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Detalles Bibliográficos
Autores principales:	Faraggi, Marisa Noemi, Gravielle, Maria Silvia
Publicado:	2005
Materias:	Band-structure-based (BSB) model Plasmon excitations Surface-state contributions Aluminum Band structure Dielectric materials Energy dissipation
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n1_p_Faraggi http://hdl.handle.net/20.500.12110/paper_10502947_v72_n1_p_Faraggi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10502947_v72_n1_p_Faraggi
record_format	dspace
spelling	paper:paper_10502947_v72_n1_p_Faraggi2023-06-08T16:02:16Z Band-structure-based collisional model for electronic excitations in ion-surface collisions Faraggi, Marisa Noemi Gravielle, Maria Silvia Band-structure-based (BSB) model Plasmon excitations Surface-state contributions Aluminum Band structure Dielectric materials Energy dissipation Energy loss per unit path in grazing collisions with metal surfaces is studied by using the collisional and dielectric formalisms. Within both theories we make use of the band-structure-based (BSB) model to represent the surface interaction. The BSB approach is based on a model potential and provides a precise description of the one-electron states and the surface-induced potential. The method is applied to evaluate the energy lost by 100 keV protons impinging on aluminum surfaces at glancing angles. We found that when the realistic BSB description of the surface is used, the energy loss obtained from the collisional formalism agrees with the dielectric one, which includes not only binary but also plasmon excitations. The distance-dependent stopping power derived from the BSB model is in good agreement with available experimental data. We have also investigated the influence of the surface band structure in collisions with the Al(100) surface. Surface-state contributions to the energy loss and electron emission probability are analyzed. © 2005 The American Physical Society. Fil:Faraggi, M.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gravielle, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n1_p_Faraggi http://hdl.handle.net/20.500.12110/paper_10502947_v72_n1_p_Faraggi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Band-structure-based (BSB) model Plasmon excitations Surface-state contributions Aluminum Band structure Dielectric materials Energy dissipation
spellingShingle	Band-structure-based (BSB) model Plasmon excitations Surface-state contributions Aluminum Band structure Dielectric materials Energy dissipation Faraggi, Marisa Noemi Gravielle, Maria Silvia Band-structure-based collisional model for electronic excitations in ion-surface collisions
topic_facet	Band-structure-based (BSB) model Plasmon excitations Surface-state contributions Aluminum Band structure Dielectric materials Energy dissipation
description	Energy loss per unit path in grazing collisions with metal surfaces is studied by using the collisional and dielectric formalisms. Within both theories we make use of the band-structure-based (BSB) model to represent the surface interaction. The BSB approach is based on a model potential and provides a precise description of the one-electron states and the surface-induced potential. The method is applied to evaluate the energy lost by 100 keV protons impinging on aluminum surfaces at glancing angles. We found that when the realistic BSB description of the surface is used, the energy loss obtained from the collisional formalism agrees with the dielectric one, which includes not only binary but also plasmon excitations. The distance-dependent stopping power derived from the BSB model is in good agreement with available experimental data. We have also investigated the influence of the surface band structure in collisions with the Al(100) surface. Surface-state contributions to the energy loss and electron emission probability are analyzed. © 2005 The American Physical Society.
author	Faraggi, Marisa Noemi Gravielle, Maria Silvia
author_facet	Faraggi, Marisa Noemi Gravielle, Maria Silvia
author_sort	Faraggi, Marisa Noemi
title	Band-structure-based collisional model for electronic excitations in ion-surface collisions
title_short	Band-structure-based collisional model for electronic excitations in ion-surface collisions
title_full	Band-structure-based collisional model for electronic excitations in ion-surface collisions
title_fullStr	Band-structure-based collisional model for electronic excitations in ion-surface collisions
title_full_unstemmed	Band-structure-based collisional model for electronic excitations in ion-surface collisions
title_sort	band-structure-based collisional model for electronic excitations in ion-surface collisions
publishDate	2005
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v72_n1_p_Faraggi http://hdl.handle.net/20.500.12110/paper_10502947_v72_n1_p_Faraggi
work_keys_str_mv	AT faraggimarisanoemi bandstructurebasedcollisionalmodelforelectronicexcitationsinionsurfacecollisions AT graviellemariasilvia bandstructurebasedcollisionalmodelforelectronicexcitationsinionsurfacecollisions
_version_	1768543046220120064

Band-structure-based collisional model for electronic excitations in ion-surface collisions

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