50
3 Modification of the Work Function
Fig. 3.13 Cross sections of
electron density of TaCx
a without vacancies and
b with vacancies both in the
bulk and at the surface [13]
(a) No vacancies
(b) Surface & bulk vacancies
Φ=
3.84eV
Φ=
4.11eV
(+0.27)
Fig. 3.14 DOS of each
component at the Fermi level
for TaC with vacancies [13]
Ta-derived
Fermi level