F.J. Himpsel, D.E. Eastman, et al.
Physical Review B
The energy gap between the lowest two valence bands for several binary compounds has been determined from photoemission distributions and is found to be a good measure of the ionicity parameter C of the Philips-Van Vechten theory. © 1973.
F.J. Himpsel, D.E. Eastman, et al.
Physical Review B
H. Lüth, G.W. Rubloff, et al.
Solid State Communications
D.E. Eastman
Physical Review B
J.E. Demuth, D.E. Eastman
Physical Review B