https://doi.org/10.1007/s100510170198
Interplay between spin-density-wave and superconducting states in quasi-one-dimensional conductors
Centre de Recherche sur les Propriétés Électroniques de
Matériaux Avancés, Département de Physique, Université de Sherbrooke, Sherbrooke,
Québec, J1K 2R1, Canada
Corresponding author: a cbourbon@physique.usherb.ca
Received:
3
January
2001
Revised:
1
March
2001
Published online: 15 May 2001
The interference between spin-density-wave and superconducting instabilities in quasi-one-dimensional correlated metals is analyzed using the renormalization group method. At the one-loop level, we show how the interference leads to a continuous crossover from a spin-density-wave state to unconventional superconductivity when deviations from perfect nesting of the Fermi surface exceed a critical value. Singlet pairing between electrons on neighboring stacks is found to be the most favorable symmetry for superconductivity. The consequences of non uniform spin-density-wave pairing on the structure of phase diagram within the crossover region is also discussed.
PACS: 71.10.Li – Excited states and pairing interactions in model systems / 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 74.70.Kn – Organic superconductors
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
