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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.
W.J. Pardee, G.D. Mahan, et al.
Physical Review B
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Surface Science
M. Aono, T.-C. Chiang, et al.
Physical Review B
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Physical Review B