LONG-RANGE COULOMB EFFECTS IN THE CUPRATES - A POSSIBLE ALTERNATIVE ROUTE TO D-WAVE SUPERCONDUCTIVITY

Under the assumption that high T-c superconductivity is driven by Coul omb interactions in some form, we are motivated to study the screening of this long range interaction and its implications for superconducti ng symmetry. Essential to our calculations are tight binding bandstruc ture effects which give rise to structure in the dielectric constant s ufficient to produce a d(x2-y2) State with moderate coupling constant. Our results suggest that Coulomb interactions, and, therefore, superc onductivity, may be more complex than can be deduced from a simple Hub bard model, which is generally associated with pairing in the ''spin c hannel''.