Interaction of He/sup +/ and Ne/sup +/ ions with Ni(100)-K and Cu(100)-K surfaces having variable potassium coverage

Journal Article · Tue Nov 15 00:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.10264· OSTI ID:6719506

Hagstrum, H D; Petrie, P; Chaban, E E

This paper presents an electron-spectroscopic study employing slow He/sup +/ and Ne/sup +/ ions incident on Ni(100) and Cu(100) surfaces with varying amounts of adsorbed potassium. Investigation of the changes in electron-energy spectra as the work function of the surface is varied probes the pattern of resonance tunneling, excitation conversion, and Auger electron-ejection processes. When the surface is clean the work function phi is high and the mode of electron ejection is the two-electron process of Auger neutralization of the incident ions yielding a folded two-electron spectrum. As the macroscopic phi is reduced by K adsorption the surface develops more and more regions near K atoms where the local phi is small, permitting resonance neutralization of the incident ion to form a metastable atom which on Auger deexcitation ejects electrons in a one-electron spectrum.

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974-2070
• OSTI ID: 6719506
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 38:15
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER
ELECTRON SPECTROSCOPY
ION COLLISIONS
SORPTIVE PROPERTIES
HELIUM IONS
COLLISIONS
NEON IONS
NICKEL
POTASSIUM
ADSORPTION
AUGER EFFECT
LAYERS
PHOTOELECTRON SPECTROSCOPY
RESONANCE
TUNNEL EFFECT
WORK FUNCTIONS
ALKALI METALS
CHARGED PARTICLES
ELEMENTS
FUNCTIONS
IONS
METALS
SORPTION
SPECTROSCOPY
SURFACE PROPERTIES
TRANSITION ELEMENTS
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)