G. Abramovici et al., OXYGEN-INDUCED SURFACE CORE-LEVEL SHIFTS OF W(110) DEDUCED FROM SURFACE SEGREGATION ENERGIES, Journal de physique. I, 5(7), 1995, pp. 907-916
We calculate the core-level shift induced by oxygen adsorbates on the
surface atoms of W(110). We use the equivalent core approximation whic
h reduces this problem to the computation of the variation of the surf
ace segregation energy of a rhenium impurity in a (110) tungsten cryst
al due to the presence of chemisorbed oxygen atoms. The calculation is
carried out in the framework of the tight-binding approximation. The
results are compared with previous simpler approaches and suggest a ne
w interpretation of experimental data.