Gv. Benemanskaya et al., THE PHOTOEMISSION THRESHOLD OF THE BI2SR2CACU2O8 CRYSTAL COATED WITH K AND CS SUBMONOLAYERS, Superconductor science and technology, 7(7), 1994, pp. 486-490
The photoemission threshold was studied for the Bi2Sr2CaCu2O8 crystal
with K and Cs submonolayer films deposited upon its surface. The films
had different surface concentrations of K and Cs atoms. An anomalous
concentration dependence of the threshold was found at T < T(c). The m
ain feature is an appreciable energy shift of the threshold (up to 0.4
eV) for a large variety of submonolayer coatings.