THE ROLE OF ATOMIC-HYDROGEN AND ITS INFLUENCE ON THE ENHANCEMENT OF SECONDARY-ELECTRON EMISSION FROM C(001) SURFACES

Authors
HUMPHREYS TP THOMAS RE MALTA DP POSTHILL JB MANTINI MJ RUDDER RA HUDSON GC MARKUNAS RJ PETTENKOFER C
Citation
Tp. Humphreys et al., THE ROLE OF ATOMIC-HYDROGEN AND ITS INFLUENCE ON THE ENHANCEMENT OF SECONDARY-ELECTRON EMISSION FROM C(001) SURFACES, Applied physics letters, 70(10), 1997, pp. 1257-1259
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
70
Issue
10
Year of publication
1997
Pages
1257 - 1259
Database
ISI
SICI code
0003-6951(1997)70:10<1257:TROAAI>2.0.ZU;2-9
Abstract
The role of chemisorbed hydrogen in the enhancement of low-energy elec tron emission from natural type IIb C(001) diamond surfaces has been i nvestigated. A hydrogen induced low-energy emission peak, whose intens ity was found to be a linear function of surface coverage, was observe d. The direct observation of emission from vacuum level states in the photoemission spectra has determined a negative electron affinity of s imilar to 0.4 eV for the hydrogenated C(001)-1x1 surface. Constant ini tial states photoemission has unambiguously identified the electron em ission process with the escape of electrons from bulk electron states at the conduction-band minimum. (C) 1997 American Institute of Physics .