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Title: Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces

Abstract

Recent measurements of He{sup +} ion fractions that survive to a whole scatterig event when they impinge on Ag surfaces have shown two different and interesting effects: (1) a notable difference of surviving ion fraction depending on which crystallographic face of the target surface is studied [Yu. Bandurin et al., Phys. Rev. Lett. 92, 017601 (2004)], and (2) an uncommonly high ion fraction in the very-low-energy range (tens of eV) [S. Wethekam et al., Phys. Rev. Lett. 90, 037602 (2003)]. Apart from the geometry, one of the differences between the surfaces of a crystal can be seen in the electronic structure: while the (111) surface has an occupied surface state near the Fermi level at the {gamma} point the (110) and (100) faces have not. Motivated by these facts, in this work we study the role that the occupied surface state plays on the Auger neutralization rate and we present an estimation of the ion fractions that survive for the different Ag faces.

Authors:
; ;  [1];  [2];  [3]
  1. Fisika Aplikatua I Saila, Unibertsitate Eskola Politeknikoa, UPV/EHU, Europa Plaza 1, 20018 Donostia (Spain)
  2. (DIPC), Manuel de Lardizabal pasealekua 4, 20018 Donostia (Spain)
  3. (Spain)
Publication Date:
OSTI Identifier:
20976665
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevB.75.045104; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AUGER EFFECT; CRYSTALLOGRAPHY; CRYSTALS; ELECTRONIC STRUCTURE; EV RANGE; FERMI LEVEL; HELIUM IONS; SILVER; SURFACES

Citation Formats

Sarasola, A., Silkin, V. M., Arnau, A., Donostia International Physics Center, and Materialen Fisika Saila, Kimika Fakultatea, UPV/EHU and Centro Mixto CSIC-UPV/EHU, 1072 Posta Kutxatila, 20080 Donostia. Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces. United States: N. p., 2007. Web. doi:10.1103/PHYSREVB.75.045104.
Sarasola, A., Silkin, V. M., Arnau, A., Donostia International Physics Center, & Materialen Fisika Saila, Kimika Fakultatea, UPV/EHU and Centro Mixto CSIC-UPV/EHU, 1072 Posta Kutxatila, 20080 Donostia. Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces. United States. doi:10.1103/PHYSREVB.75.045104.
Sarasola, A., Silkin, V. M., Arnau, A., Donostia International Physics Center, and Materialen Fisika Saila, Kimika Fakultatea, UPV/EHU and Centro Mixto CSIC-UPV/EHU, 1072 Posta Kutxatila, 20080 Donostia. Mon . "Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces". United States. doi:10.1103/PHYSREVB.75.045104.
@article{osti_20976665,
title = {Role of surface states in Auger neutralization of He{sup +} ions on Ag surfaces},
author = {Sarasola, A. and Silkin, V. M. and Arnau, A. and Donostia International Physics Center and Materialen Fisika Saila, Kimika Fakultatea, UPV/EHU and Centro Mixto CSIC-UPV/EHU, 1072 Posta Kutxatila, 20080 Donostia},
abstractNote = {Recent measurements of He{sup +} ion fractions that survive to a whole scatterig event when they impinge on Ag surfaces have shown two different and interesting effects: (1) a notable difference of surviving ion fraction depending on which crystallographic face of the target surface is studied [Yu. Bandurin et al., Phys. Rev. Lett. 92, 017601 (2004)], and (2) an uncommonly high ion fraction in the very-low-energy range (tens of eV) [S. Wethekam et al., Phys. Rev. Lett. 90, 037602 (2003)]. Apart from the geometry, one of the differences between the surfaces of a crystal can be seen in the electronic structure: while the (111) surface has an occupied surface state near the Fermi level at the {gamma} point the (110) and (100) faces have not. Motivated by these facts, in this work we study the role that the occupied surface state plays on the Auger neutralization rate and we present an estimation of the ion fractions that survive for the different Ag faces.},
doi = {10.1103/PHYSREVB.75.045104},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 4,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}