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Title: He-LiF surface interaction potential from fast atom diffraction

Diffraction patterns produced by grazing scattering of fast atoms from insulator surfaces are used to examine the atom-surface interaction. The method is applied to He atoms colliding with a LiF(001) surface along axial crystallographic channels. The projectile-surface potential is obtained from an accurate density-functional theory calculation, which includes polarization effects and surface relaxation. For the description of the collision process we employ the surface eikonal approximation, which takes into account quantum interference between different projectile paths. The dependence of projectile spectra on the parallel and perpendicular incident energies is experimentally and theoretically analyzed, demonstrating the range of applicability of the proposed model.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Institut fuer Physik, Humboldt Universitaet zu Berlin, Newtonstrasse 15, D-12489 Berlin-Adlershof (Germany)
  2. Instituto de Astronomia y Fisica del Espacio, Consejo Nacional de Investigaciones Cientificas y Tecnicas, Casilla de Correo 67, Sucursal 28, C1428EGA Buenos Aires (Argentina)
  3. (Argentina)
  4. Centre d'Investigacio en Nanociencia i Nanotecnologia-CIN2 (CSIC-ICN), Campus UAB, 08193 Bellaterra (Spain)
Publication Date:
OSTI Identifier:
21352365
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 80; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevA.80.062903; (c) 2009 The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATOMS; COLLISIONS; CRYSTALLOGRAPHY; DENSITY FUNCTIONAL METHOD; DIFFRACTION; EIKONAL APPROXIMATION; HELIUM; INTERACTIONS; INTERFERENCE; LITHIUM FLUORIDES; POLARIZATION; RELAXATION; SPECTRA; SURFACE POTENTIAL; SURFACES ALKALI METAL COMPOUNDS; APPROXIMATIONS; CALCULATION METHODS; COHERENT SCATTERING; ELEMENTS; FLUIDS; FLUORIDES; FLUORINE COMPOUNDS; GASES; HALIDES; HALOGEN COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM HALIDES; NONMETALS; POTENTIALS; RARE GASES; SCATTERING; VARIATIONAL METHODS