Superconductor-to-Insulator Transition in an Organic Metal Incorporating Magnetic Anions

摘要

It is well-known that antiferromagnetic order and supercon- ducting state coexist in inorganic systems such as ErRh_4B_4 and HoMo_6S_8~16 and the dense Kondo heavy Fermion compounds. In the present λ-(BETS)_2(Fe_xGa_1-x)Cl_4 systems, by contrast, Antiferromagnetism and superconductivity compete with each Other.