Superconducting pairing and density-wave instabilities in quasi-one-dimensional conductors
| dc.creator | Nickel, J. C. | |
| dc.creator | Duprat, R. | |
| dc.creator | Bourbonnais, C. | |
| dc.creator | Dupuis, N. | |
| dc.date | 2005-10-27 | |
| dc.date.accessioned | 2026-07-07T06:45:36Z | |
| dc.date.available | 2026-07-07T06:45:36Z | |
| dc.description | Using a renormalization group approach, we determine the phase diagram of an extended quasi-one-dimensional electron gas model that includes interchain hopping, nesting deviations and both intrachain and interchain repulsive interactions. d-wave superconductivity, which dominates over the spin-density-wave (SDW) phase at large nesting deviations, becomes unstable to the benefit of a triplet $f$-wave phase for a weak repulsive interchain backscattering term $g_1^\perp>0$, despite the persistence of dominant SDW correlations in the normal state. Antiferromagnetism becomes unstable against the formation of a charge-density-wave state when $g_1^\perp$ exceeds some critical value. While these features persist when both Umklapp processes and interchain forward scattering ($g_2^\perp$) are taken into account, the effect of $g_2^\perp$ alone is found to frustrate nearest-neighbor interchain $d$- and $f$-wave pairing and instead favor next-nearest-neighbor interchain singlet or triplet pairing. We argue that the close proximity of SDW and charge-density-wave phases, singlet d-wave and triplet $f$-wave superconducting phases in the theoretical phase diagram provides a possible explanation for recent puzzling experimental findings in the Bechgaard salts, including the coexistence of SDW and charge-density-wave phases and the possibility of a triplet pairing in the superconducting phase. | |
| dc.description | 19 pages, 13 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0510744 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0510744 | |
| dc.identifier | Phys. Rev. B 73, 165126 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.73.165126 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/103085 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Superconducting pairing and density-wave instabilities in quasi-one-dimensional conductors | |
| dc.type | text |