title: Pairing and superconductivity driven by strong quasiparticle renormalization in two-dimensional organic charge transfer salts.
abstract: We introduce and analyze a variational wave function for quasi-two-dimensional kappa-(ET)(2) organic salts containing strong local and nonlocal correlation effects. We find an unconventional superconducting ground state for intermediate charge carrier interaction, sandwiched between a conventional metal at weak coupling and a spin liquid at larger coupling. Most remarkably, the excitation spectrum is dramatically renormalized and is found to be the driving force for the formation of the unusual superconducting state.
authors.affiliation: Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Jörg
authors.initials: J
authors.lastname: Schmalian
authors.forename: Nandini
authors.initials: N
authors.lastname: Trivedi