Domain walls at the spin density wave endpoint of the organic superconductor (TMTSF)2PF6 under pressure

Ning Kang (1) , Pascale Auban-Senzier (1) , Denis Jérome (1) , Claude R. Pasquier (1) , Belal Salameh (2) , Serguei Brazovskii (3)

1 LPS - Laboratoire de Physique des Solides
2 Department of Applied Physics [Tafila]
3 LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques

We report the first comprehensive investigation of the organic superconductor (TMTSF)2PF6 in the vicinity of the endpoint of the spin density wave - metal phase transition where phase coexistence occurs. At low temperature, the transition of metallic domains towards superconductivity is used to reveal the various textures. In particular, we demonstrate experimentally the existence of 1D and 2D metallic domains with a cross-over from a filamentary superconductivity mostly along the c⋆-axis to a 2D superconductivity in the b′c-plane perpendicular to the most conducting direction. The formation of these domain walls may be related to the proposal of a soliton phase in the vicinity of the critical pressure of the (TMTSF)2PF6 phase diagram.

Mots clés: superconductivity; organic materials

Domaines: Electrons fortement corrélés [cond-mat.str-el]; Supraconductivité [cond-mat.supr-con]

Ning Kang, Pascale Auban-Senzier, Denis Jérome, Claude R. Pasquier, Belal Salameh, et al.. Domain walls at the spin density wave endpoint of the organic superconductor (TMTSF)2PF6 under pressure. 2009. ⟨hal-00457963⟩