Comparison of the phase diagram of the half-filled layered organic superconductors with the phase diagram of the RVB theory of the Hubbard-Heisenberg model

Simple item page
dc.creatorPowell, B. J.
dc.creatorMcKenzie, Ross H.
dc.date2004-10-05
dc.date2004-12-16
dc.date.accessioned2026-07-07T03:01:17Z
dc.date.available2026-07-07T03:01:17Z
dc.descriptionWe present an resonating valence bond (RVB) theory of superconductivity for the Hubbard--Heisenberg model on an anisotropic triangular lattice. We show that these calculations are consistent with the observed phase diagram of the half-filled layered organic superconductors, such as the beta, beta', kappa and lambda phases of (BEDT-TTF)_2X [bis(ethylenedithio)tetrathiafulvalene] and (BETS)_2X [bis(ethylenedithio)tetraselenafulvalene]. We find a first order transition from a Mott insulator to a d_{x^2-y^2} superconductor with a small superfluid stiffness and a pseudogap with d_{x^2-y^2} symmetry. The Mott--Hubbard transition can be driven either by increasing the on-site Coulomb repulsion, U, or by changing the anisotropy of the two hopping integrals, t'/t. Our results suggest that the ratio t'/t plays an important role in determining the phase diagram of the organic superconductors.
dc.description4 pages, 3 figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0410125
dc.identifierhttp://arxiv.org/abs/cond-mat/0410125
dc.identifierPhys. Rev. Lett. 94, 047004 (2005)
dc.identifierdoi:10.1103/PhysRevLett.94.047004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25008
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleComparison of the phase diagram of the half-filled layered organic superconductors with the phase diagram of the RVB theory of the Hubbard-Heisenberg model
dc.typetext

Files

Collections

arXiv