Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach

For fast atom diffraction (FAD) from crystal surfaces we introduce a distorted wave method, based on the semi-quantum approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the Surface Eikonal (SE) model. The theory, named Surface Initial Value Re...

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Detalles Bibliográficos
Publicado: 2015
Materias:
Condensed matter physics
Diffraction
Angular regions
Crystal surfaces
Distorted wave methods
Fast atom diffractions
Initial value representation
Quantum approach
Quantum evolution
Rainbow effects
Atoms
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v635_n3_p_Gravielle
http://hdl.handle.net/20.500.12110/paper_17426588_v635_n3_p_Gravielle
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_17426588_v635_n3_p_Gravielle2023-06-08T16:27:40Z Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach Condensed matter physics Diffraction Angular regions Crystal surfaces Distorted wave methods Fast atom diffractions Initial value representation Quantum approach Quantum evolution Rainbow effects Atoms For fast atom diffraction (FAD) from crystal surfaces we introduce a distorted wave method, based on the semi-quantum approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the Surface Eikonal (SE) model. The theory, named Surface Initial Value Representation (SIVR) approximation, is applied to H and He atoms colliding with a LiF(001) surface, using pair-wise additive and DFT-derived potentials. The SIVR approach provides a very good representation of the experimental distributions, even in the angular region around classical rainbow angles where the SE method diverges. In addition, the influence of the incident wave-packet is analyzed. © Published under licence by IOP Publishing Ltd. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v635_n3_p_Gravielle http://hdl.handle.net/20.500.12110/paper_17426588_v635_n3_p_Gravielle
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Condensed matter physics
Diffraction
Angular regions
Crystal surfaces
Distorted wave methods
Fast atom diffractions
Initial value representation
Quantum approach
Quantum evolution
Rainbow effects
Atoms
spellingShingle Condensed matter physics
Diffraction
Angular regions
Crystal surfaces
Distorted wave methods
Fast atom diffractions
Initial value representation
Quantum approach
Quantum evolution
Rainbow effects
Atoms
Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
topic_facet Condensed matter physics
Diffraction
Angular regions
Crystal surfaces
Distorted wave methods
Fast atom diffractions
Initial value representation
Quantum approach
Quantum evolution
Rainbow effects
Atoms
description For fast atom diffraction (FAD) from crystal surfaces we introduce a distorted wave method, based on the semi-quantum approach of the quantum evolution operator, in order to improve the description of rainbow effects given by the Surface Eikonal (SE) model. The theory, named Surface Initial Value Representation (SIVR) approximation, is applied to H and He atoms colliding with a LiF(001) surface, using pair-wise additive and DFT-derived potentials. The SIVR approach provides a very good representation of the experimental distributions, even in the angular region around classical rainbow angles where the SE method diverges. In addition, the influence of the incident wave-packet is analyzed. © Published under licence by IOP Publishing Ltd.
title Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
title_short Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
title_full Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
title_fullStr Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
title_full_unstemmed Fast atom diffraction of H and He from a LiF(001) surface: Semi-quantum approach
title_sort fast atom diffraction of h and he from a lif(001) surface: semi-quantum approach
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v635_n3_p_Gravielle
http://hdl.handle.net/20.500.12110/paper_17426588_v635_n3_p_Gravielle
_version_ 1768544976051896320

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