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

N. Kang; B. Salameh; P. Auban-Senzier; D. Jérome; C. R. Pasquier; S. Brazovskii

doi:10.1103/PhysRevB.81.100509

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

N. Kang, B. Salameh, P. Auban-Senzier, D. Jérome, C. R. Pasquier, S. Brazovskii

DOI 10.1103/PhysRevB.81.100509 · Physical Review B

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Abstract

We report a 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 toward superconductivity is used to reveal the various textures. In particular, we demonstrate experimentally the existence of one-dimensional and two-dimensional (2D) metallic domains with a crossover 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.45	0.8 GPa	onset
(TMTSF)2PF6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.76	0.83 GPa	onset