21st CEMS Colloquium


Dr. Reizo Kato (Chief Scientist, Condensed Molecular Materials Laboratory, RIKEN)


17:30 - 18:30, October 15, 2014 (Wednesday)


Okochi-Hall, RIKEN


Multi-band Molecular Conductors


Molecular conductors have been characterized by simple and clear electronic structures where a conduction band originates from one of frontier molecular orbitals (HOMO or LUMO) and the tight-binding band picture works quite well. Recently, however, it has been reported that an increasing number of molecular conductors have more than two bands near the Fermi level and the multi-band interactions provide unique physical properties. I will introduce the following two types of multi-band molecular conductors based on metal dithiolene complexes;
(1) Frustrated dimer-Mott system where a quantum spin liquid state competes with various electronic phases including antiferromagnetic order, charge order, and valence bond order.
(2) Single-component molecular conductors that possibly have the Dirac cone structure.<./p>