[Supraconductivité et antiferromagnétisme comme mises en ordre interférentes dans les conducteurs organiques]
La supraconductivité dans les conducteurs organiques quasi-unidimensionnels tels que les sels de Bechgaard émerge sous pression hydrostatique au seuil dʼinstabilité de la mise en ordre onde de densité de spin. Cette séquence dʼinstabilités est intimement liée aux anomalies rencontrées en phase normale pour la résistivité et le taux de relaxation nucléaire. Nous discutons de lʼorigine microscopique dʼun tel lien en termes dʼinterférence quantique entre les mécanismes responsables de lʼantiferromagnétisme et de la supraconductivité, lesquels peuvent être décrits à lʼaide de lʼapproche du groupe de renormalisation en couplage faible. Nous résumons à ce propos les derniers développements théoriques et leurs relations avec lʼexpérience.
Superconductivity in the Bechgaard salts series of quasi-one-dimensional organic conductors occurs on the verge of spin-density-wave ordering when hydrostatic pressure is applied. The sequence of instabilities is intimately connected to normal state anomalies in various quantities like the temperature dependence of electrical transport and nuclear spin–lattice relaxation rate. We discuss how such a connection takes its origin in the interference between the different pairing mechanisms responsible for antiferromagnetism and superconductivity, a duo that can be comprehended in terms of a weak coupling renormalization group theory. The recent developments along this line of though are presented in relation to experiments.
Mots-clés : Conducteurs organiques, Supraconductivité, Antiferromagnétisme, Groupe de renormalisation
Claude Bourbonnais 1, 2 ; Abdeliouahab Sedeki 1
@article{CRPHYS_2011__12_5-6_532_0, author = {Claude Bourbonnais and Abdeliouahab Sedeki}, title = {Superconductivity and antiferromagnetism as interfering orders in organic conductors}, journal = {Comptes Rendus. Physique}, pages = {532--541}, publisher = {Elsevier}, volume = {12}, number = {5-6}, year = {2011}, doi = {10.1016/j.crhy.2011.04.005}, language = {en}, }
TY - JOUR AU - Claude Bourbonnais AU - Abdeliouahab Sedeki TI - Superconductivity and antiferromagnetism as interfering orders in organic conductors JO - Comptes Rendus. Physique PY - 2011 SP - 532 EP - 541 VL - 12 IS - 5-6 PB - Elsevier DO - 10.1016/j.crhy.2011.04.005 LA - en ID - CRPHYS_2011__12_5-6_532_0 ER -
Claude Bourbonnais; Abdeliouahab Sedeki. Superconductivity and antiferromagnetism as interfering orders in organic conductors. Comptes Rendus. Physique, Superconductivity of strongly correlated systems, Volume 12 (2011) no. 5-6, pp. 532-541. doi : 10.1016/j.crhy.2011.04.005. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.04.005/
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