Ll. Daemen et Aw. Overhauser, REMARK ON THE ISOTOPE EFFECT AT HIGHER CRITICAL-TEMPERATURES, Physical review. B, Condensed matter, 49(22), 1994, pp. 16046-16047
Behavior of the isotope effect when the superconducting T(c) becomes l
arge on account of an attractive, short-range interaction is reviewed.
We explain the difference between results obtained using the two-squa
re-well model and those found by using McMillan's equation.