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arXiv 1002.3767cond-mat.str-elcond-mat.supr-con
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高压下有机超导体(TMTSF)2 PF 6自旋密度波端点处的畴壁

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

Ning Kang, Pascale Auban-Senzier, Denis Jérome, Claude Pasquier, Belal Salameh, Serguei Brazovskii

摘要:

我们报告的第一个全面调查的有机超导体(TMTSF)2 PF 6在附近的自旋密度波-金属相变的端点相共存发生。在低温下,金属畴向超导电性的转变被用来揭示各种织构。特别地,我们通过实验证明了一维和二维金属畴的存在,这些畴主要沿着c?轴的二维超导在b?c平面垂直于最导电的方向。这些畴壁的形成可能与(TMTSF)2 PF 6相图的临界压力附近的孤子相的建议有关。

英文摘要:

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.

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