title: SO(4) theory of antiferromagnetism and superconductivity in Bechgaard salts.
abstract: Motivated by recent experiments with Bechgaard salts, we investigate the competition between antiferromagnetism and triplet superconductivity in quasi-one-dimensional electron systems. We unify the two orders in an SO(4) symmetric framework, demonstrating the existence of such symmetry in one-dimensional Luttinger liquids. SO(4) symmetry strongly constrains the phase diagram, leading to coexistence regions of antiferromagnetic, superconducting, and normal phases, as observed in (TMTSF)(2)PF(6). We predict a sharp neutron scattering resonance in superconducting samples.
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Podolsky
authors.forename: Ehud
authors.initials: E
authors.lastname: Altman
authors.forename: Timofey
authors.initials: T
authors.lastname: Rostunov
authors.forename: Eugene
authors.initials: E
authors.lastname: Demler