Organic superconductors: How can we increase the critical temperature?

We argue that phonons are the main responsible for the electron pairing in organic superconductors. Lattice dynamics calculations and spectroscopic measurements on BEDT-TTF based superconductors show that both inter- and intra-molecular phonons are involved in the superconductivity mechanism. The former give the main weight to the dimensionless coupling constant A, whereas the latter increase the average logarithmic phonon frequency, ω In .