Applied Physics Letters · 1997 · 42 citations · 8 references
Natural SciencesMaterials EngineeringMaterials SciencePhysical ChemistrySurface ChemistrySurface ScienceEmission SpectroscopyHydrogen AtomPhotoelectron SpectroscopySurface EnergeticsSurface PhysicsSurface SpectroscopyAtomic BondingConductionConduction BandElectron AffinityHydrogen ChemistrySecondary Electron EmissionSecondary Electron ProductionSurface Coverage
The role of chemisorbed hydrogen in the enhancement of low-energy electron emission from natural type IIb C(001) diamond surfaces has been investigated. A hydrogen induced low-energy emission peak, whose intensity was found to be a linear function of surface coverage, was observed. The direct observation of emission from vacuum level states in the photoemission spectra has determined a negative electron affinity of ∼0.4 eV for the hydrogenated C(001)-1×1 surface. Constant initial states photoemission has unambiguously identified the electron emission process with the escape of electrons from bulk electron states at the conduction-band minimum.
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Negative-electron-affinity effects on the diamond (100) surface
J. van der Weide, Zheng Zhang, P. K. Baumann et al. · Physical review. B, Condensed matter · 1994 · 400 citations
Photoemission studies of core exciton decay in KI
G. J. Lapeyre, A. Baer, John C. Hermanson et al. · Solid State Communications · 1974 · 91 citations