Coexistence of Conducting and Magnetic Electrons Based on Molecular π-Electrons in the Supramolecular Conductor (Me-3,5-DIP)[Ni(dmit)_2]_2

摘要

Our development of the supramolecular Ni(dmit)_2 anion radical salts provides a new magnetic molecular conductor that has two kinds of layers of Ni(dmit)_2 anions. Two-dimensional metallic conduction and paramagnetism with AF interactions both stem from molecular π-electrons of Ni(dmit)_2 contained separately in each layer: "one" kind of molecule playing "two" contrastive roles. This is the first system where conducting and magnetic π-electrons coexist down to 4.2 K. Studies of the cooperative properties of the two types of electrons are underway.