Singlet/triplet transition in a two-band organic superconductor

We study quasi-one-dimensional organic superconductors with two-band dispersion. We use spin ladder approximation with the Hubbard model. We determine the symmetry of the Cooper pairing by calculating the free energy. Thanks to close values of singlet and triplet scatterings, the phase diagram revea...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Solid state sciences 2008-12, Vol.10 (12), p.1790-1793
Hauptverfasser:	Abramovici, G., Belmechri, N., Héritier, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Crystalline state (including molecular motions in solids) Exact sciences and technology Magnetism Materials science Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Phase diagrams of metals and alloys Phase transition Physics Singlet symmetry Strongly interacting electrons Structure of solids and liquids crystallography Superconductors Theory of crystal structure, crystal symmetry calculations and modeling Triplet symmetry
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We study quasi-one-dimensional organic superconductors with two-band dispersion. We use spin ladder approximation with the Hubbard model. We determine the symmetry of the Cooper pairing by calculating the free energy. Thanks to close values of singlet and triplet scatterings, the phase diagram reveals that, at high magnetic field, the triplet configuration is more favorable, indicating a transition from singlet superconducting state at low fields to triplet one. This result confirms similar ones in one-band system and can explain recent experimental results on (TMTSF) 2ClO 4. [Display omitted]
ISSN:	1293-2558 1873-3085
DOI:	10.1016/j.solidstatesciences.2008.01.029