Control of electronic properties of organic superconductors by uniaxial strain method

We controlled the electronic properties of BEDT-TTF based organic conductors by using the uniaxial strain method. Electronic properties of θ-(BEDT-TTF) 2 CsZn(SCN) 4 were able to be controlled as suggested by the unified phase diagram proposed to this series of compounds. α-(BEDT-TTF) 2 XH g (SCN) 4 (X=K, NH 4 ) showed essentially the same properties if their lattice parameters are appropriately controlled by the uniaxial strain method. Furthermore the reduction of the lattice parameter c enhanced the superconductivity suggesting that conventional discussions based on the volume effect is insufficient.