  We have employed uniaxial stress along the principal axes of the quasi-two
dimensional organic superconductor $\kappa $--(BEDT-TTF)$_{2}$Cu(SCN)$_{2}$.
The lattice anisotropy is thereby altered, with corresponding changes in the
intermolecular transfer energies. The effect of uniaxial stress on the
superconducting transition temperature $T_{c}$ and critical field $B_{c2}$ is
found to be anisotropic.There is an indication of an increase in $T_{c}$ and
$B_{c2}$ for in-plane stress, but both parameters decrease rapidly for
transverse (inter-plane) stress. Magnetotransport studies reveal stress-induced
changes in the Fermi surface through the observation of the Shubnikov de Haas
oscillations. The stress dependence of a resistive anomaly in the
magnetoresistance, which is associated with the critical field $B_{c2}$, is
also investigated. We discuss the experimental findings in the context of
recent phenomenological and theoretical treatments of quasi-two dimensional
systems where the anisotropic triangular lattice Hubbard model has been used to
treat two-dimensional superconductors.
