Spin polarization of the Si(111)-7 × 7 surface: A study with a spin-polarized metastable helium atom beam

TY - JOUR

T1 - Spin polarization of the Si(111)-7 × 7 surface

T2 - A study with a spin-polarized metastable helium atom beam

AU - Kurahashi, M.

AU - Pratt, A.

AU - Yamauchi, Y.

PY - 2011/3/1

Y1 - 2011/3/1

N2 - We have observed the electron spin polarization of a clean Si(111) surface under external magnetic fields of 0-5 T using a spin-polarized metastable helium atom beam. By making comparisons with metastable deexcitation spectroscopy (MDS) measurements, the spin polarization has been assigned to surface dangling bonds. It has been found that the spin polarization is largely quenched by the adsorption of atomic hydrogen, and that its H-exposure dependence correlates well with that of the MDS spectrum and the low energy electron diffraction pattern.

AB - We have observed the electron spin polarization of a clean Si(111) surface under external magnetic fields of 0-5 T using a spin-polarized metastable helium atom beam. By making comparisons with metastable deexcitation spectroscopy (MDS) measurements, the spin polarization has been assigned to surface dangling bonds. It has been found that the spin polarization is largely quenched by the adsorption of atomic hydrogen, and that its H-exposure dependence correlates well with that of the MDS spectrum and the low energy electron diffraction pattern.

UR - http://www.scopus.com/inward/record.url?scp=79751537164&partnerID=8YFLogxK

U2 - 10.1016/j.susc.2010.12.027

DO - 10.1016/j.susc.2010.12.027

M3 - Article

AN - SCOPUS:79751537164

SN - 0039-6028

VL - 605

SP - 612

EP - 615

JO - Surface Science

JF - Surface Science

IS - 5-6

ER -