Nowack, AndreasPoppe, UlrichWeger, MeirSchweitzer, DieterSchwenk, Helmut2011-07-272016-03-312011-07-272016-03-311987353167193http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-64814http://elib.uni-stuttgart.de/handle/11682/7644http://dx.doi.org/10.18419/opus-7627We performed point-contact and tunneling measurements on the organic superconductors beta-(BEDT-TTF)2I3 and beta-(BEDT-TTF)2IAuI, in the normal and superconducting states. The point-contact measurement in the normal state provides the Eliashberg function alpha2(omega)F (omega). This function has maxima at 4 and 15 mV, as well as a sharp peak at 1 mV which seems to indicate a very soft phonon strongly coupled to the electrons. The measurements in the superconducting state provide the superconducting gap, which for the tunneling measurements has a value 2Delta/kB Tc=4, just slightly above the BCS value.eninfo:eu-repo/semantics/openAccessTetrathiafulvalen , Elektron-Phonon-Wechselwirkung , Organischer Supraleiter530article