Hydrogen sorption sites in holmium silicide on silicon(111)

TY - JOUR

T1 - Hydrogen sorption sites in holmium silicide on silicon(111)

AU - Eames, Christopher

AU - Woffinden, Charles

AU - Probert, Matthew I. J.

AU - Tear, Steve P.

AU - Pratt, Andrew

PY - 2010/4/15

Y1 - 2010/4/15

N2 - The hydrogen sorption sites on the surface of holmium silicide grown on Si(111) have been determined using metastable de-excitation spectroscopy, ultraviolet photoemission spectroscopy and density functional theory calculations. Comparison of calculated and measured surface density of states spectra allow us to locate the position of the second subsurface hydrogen atom in each unit cell to an interstitial site in the layer of rare earth atoms. The hydrogenation energies indicate a reaction pathway that involves concomitant site occupation. (C) 2010 Elsevier B.V. All rights reserved.

AB - The hydrogen sorption sites on the surface of holmium silicide grown on Si(111) have been determined using metastable de-excitation spectroscopy, ultraviolet photoemission spectroscopy and density functional theory calculations. Comparison of calculated and measured surface density of states spectra allow us to locate the position of the second subsurface hydrogen atom in each unit cell to an interstitial site in the layer of rare earth atoms. The hydrogenation energies indicate a reaction pathway that involves concomitant site occupation. (C) 2010 Elsevier B.V. All rights reserved.

KW - Density functional calculations

KW - Metastable induced electron spectroscopy

KW - ATOM ELECTRON-SPECTROSCOPY

KW - 2-DIMENSIONAL ER SILICIDE

KW - DEEXCITATION SPECTROSCOPY

KW - SEMICONDUCTOR TRANSITION

KW - SURFACE-STATES

KW - SI(111)

KW - ERSI2

KW - CHEMISORPTION

KW - ADSORPTION

UR - http://www.scopus.com/inward/record.url?scp=77649233168&partnerID=8YFLogxK

U2 - 10.1016/j.susc.2010.01.016

DO - 10.1016/j.susc.2010.01.016

M3 - Article

SN - 0039-6028

VL - 604

SP - 686

EP - 691

JO - Surface Science

JF - Surface Science

IS - 7-8

ER -