D.E. Eastman, P. Heimann, 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.
D.E. Eastman, P. Heimann, et al.
Physical Review B
D.E. Eastman
Physical Review B
D.E. Eastman
Physical Review Letters
F.J. Himpsel, P. Heimann, et al.
Solid State Communications