62
3 Modification of the Work Function
A
B
B
C
C
A
replace
(a)
(b)
A
B
C
A
adatom
Top view
side view
replace
adatom
bulk
Calc.WF
4.45
4.15
4.41
Exp. WF
4.39
-
4.33
replace
adatom
bulk
Fig. 3.27 a Different atomic models for Al surface segregation on Cu-9 at% Al(111). b Calculated
and experimental work functions for different atomic models
3 Modification of the Work Function
A
B
B
C
C
A
replace
(a)
(b)
A
B
C
A
adatom
Top view
side view
replace
adatom
bulk
Calc.WF
4.45
4.15
4.41
Exp. WF
4.39
-
4.33
replace
adatom
bulk
Fig. 3.27 a Different atomic models for Al surface segregation on Cu-9 at% Al(111). b Calculated
and experimental work functions for different atomic models