NDLI: 13 C-NMR study of superconducting fluctuations in κ-( BEDT-TTF ) 2 Cu [ N ( CN ) 2 ] Br

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13 C-NMR study of superconducting fluctuations in κ-( BEDT-TTF ) 2 Cu [ N ( CN ) 2 ] Br

Content Provider	Semantic Scholar
Author	Chernen’kaya, A. S. Kotov, A. Yu. Medjanika, K. Gloskovskii, Andrei Koplak, O. V. Yagubskii, Eduard B. Elmers, Hans Joachim Schǒnhense, Gerd
Copyright Year	2013
Abstract	Coexistence of superconductor (SC) and spin-density wave (SDW) phases in (TMTSF)2PF6 under pressure attracted considerable interest due to exotic SC properties. Yet the nature of SC on DW background is still unclear, one of the major complications being that all the band parameters are affected by pressure. Using various transport and magnetotransport probes we investigate instead SC and SDW coexistence in (TMTSF)2ClO4 at ambient pressure at various degrees of ClO4 anions ordering. When both SC and SDW are observed in transport, we find prehistory effects, enhancement of the SC critical field, and strong spatial anisotropy of the SC state. These features are inconsistent with the conventional model [1] of structural inhomogeneities produced by anion ordering. We reveal instead that SC and SDW regions overlap on the temperature – dimerization gap V phase diagram, where V is varied by anion ordering [2]. Using transport anisotropy measurements we study how the spatial texture of the SC phase on SDW background evolves with V [3]. Even though V affects only in-plane dispersion, SC emerges first in the interlayer direction and then inside the plane, similar to the behavior observed in (TMTSF)2PF6 [4]. We discuss this result in the framework of the soliton phase scenario [5].
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://iscom2013.evenement.usherbrooke.ca/documents/poster/ListPosterSession1.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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