Weger, MeirNowack, AndreasSchweitzer, Dieter2011-08-122016-03-312011-08-122016-03-311992353934461http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-65600http://elib.uni-stuttgart.de/handle/11682/5060http://dx.doi.org/10.18419/opus-5043We report on point contact measurements on the organic superconductor αt-(BEDT-TTF)2I3 (Tc~8K). The dV/dI vs V characteristics of homocontacts of this material show strong nonlinearities which, interpreted as a gap-structure, lead to extremly high values of Δ/κTc. Among other possibilities, we discuss the anomaly in terms of a strongly enhanced McMillan-Rowell structure Δ(ε) at ε = Δ BCS + α ph. The enhancement is caused by deviations from Eliashberg equations due to strong coupling (λ = 1-2) together with an Einstein phonon spectrum.eninfo:eu-repo/semantics/openAccessTetrathiafulvalen , Organischer Supraleiter , Metall530article