Jaime MERINO
Certain organic and organometallic molecular materials, Rb3TT·2H20 and Mo3S7(dmit)3, display a rich interplay of strong correlations, spin frustration, flat bands, spin-orbit coupling and Dirac cone physics. We have considered an effective t-J model on a decorated honeycomb lattice to describe the electronic properties of these molecular crystal layers. At half-filling, numerical analysis of the corresponding S=1/2 Heisenberg model on the decorated honeycomb lattice suggests that the ground state is a quantum spin liquid most likely of the RVB type. Based on RVB theory we find that, under hole doping, superconductivity mediated by short range antiferromagnetic correlations emerges.
Depending on the hole doping s, f and d- wave singlet pairing occurs where f-wave singlet is allowed by the lattice decoration. The superconducting critical temperatures are found to be enhanced with respect to their triangular or square lattice counterparts lacking flat bands.