Phenomenological model for organic superconductors

We present a Ginzburg-Landau model that explains some recently observed features in the upper critical field of the organic superconductor $({\mathrm{T}\mathrm{M}\mathrm{T}\mathrm{S}\mathrm{F})}_2{\mathrm{PF}}_6.$ This model takes into account the finite size of the superconducting chains and their Josephson coupling along the two transverse directions. The upper critical field is found to be strongly sensitive to sample alignment in the magnetic field.