ePubs

The open archive for STFC research publications

Full Record Details

Persistent URL	http://purl.org/net/epubs/work/34229
Record Status	Checked
Record Id	34229
Title	Energy loss in medium-energy ion scattering: a combined theoretical and experimental study of the model system Y on Si(111)
Contributors	MA Muñoz-Márquez (Warwick U.), GS Parkinson (Warwick U.), DP Woodruff (Warwick U.), A Hentz (Universidade Federal do Rio Grande do Sul), PL Grande (Universidade Federal do Rio Grande do Sul), G Schiwietz (Hahn-Meitner-Institut), TJ Wood (York U.), C Bonet (York U.), SP Tear (York U.), P Bailey (CCLRC Daresbury Lab.), TCQ Noakes (CCLRC Daresbury Lab.)
Abstract	The energy-loss spectrum associated with scattering of 100 keV H+ ions from Y atoms on Si(111) has been investigated both experimentally and theoretically. Measurements were made from Y overlayers, and from the Si(111)(1×1) two-dimensional silicide phase formed by Y on this surface, in various scattering geometries and with different surface preparations. Theoretical simulations were conducted based on calculations of the energy loss experienced in specific ion trajectories through the surface, using coupled-channel calculations to describe inner-shell ionization and excitation as a function of impact parameter. The experimental results indicate that additional broadening contributions arise from surface inhomogeneity and roughness, but for near-normal incident and outgoing trajectories the theory and experiment agree quite well. The calculations show that, even for the ideal two-dimensional silicide phase in which the Y atoms lie just below the surface, significant energy loss arises from interaction of the ions with surrounding Si atoms, leading to a complete loss of intensity at zero energy loss.
Organisation	CCLRC , MEIS
Keywords
Funding Information
Related Research Object(s):
Licence Information:
Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev B 72 (2005): 075415.	doi:10.1103/PhysRevB.72.075415		2005