SO(4) theory of antiferromagnetism and superconductivity in Bechgaard salts.
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.
Podolsky
Daniel
D
Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Altman
Ehud
E
Rostunov
Timofey
T
Demler
Eugene
E