Oxygen vibrations and acoustic surface plasmon on Be(0001)

• Spectroscopic signatures of vibrational excitations on initially oxidized Be(0001) are identified by a combination of electron energy loss spectroscopy and density functional calculations. Prominent spectral features are due to vibrations in a Be-Omixing layer. Scanning tunneling microscopy indicates that initial oxidation occurs locally in the form of islands. The acoustic surface plasmon persists on the oxygen-covered surface. Its dispersion has been determined along the (Gamma) over bar (K) over bar direction and is virtually identical to the dispersion of the acoustic surface plasmon of the clean surface.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

adsorbate vibrations

hydrogen adsorption

beryllium surface

metal-surfaces

oxidation

spectroscopy

h2o

dispersion

cu(111)

phonons

wler de

1982

journal of vacuum science & technology

v20

p930

wler de

1984

surface science

v148

p265

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