Impurity-controlled superconductivity/spin density wave interplay in the organic superconductor: (TMTSF)2ClO4
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In this article, a phase diagram of the TMTSF 2ClO4(1 − x)ReO4x solid solution in the limit of a low ReO4− substitution level (0 ≤ x ≤ 17%) has been revealed.Abstract:
The study of the anion ordered (TMTSF)2ClO4(1 − x)ReO4x solid solution in the limit of a low ReO4− substitution level (0 ≤ x ≤ 17%) has revealed a new and interesting phase diagram. Superconductivity is drastically suppressed as the effect of ReO4− non-magnetic point defects increases following the digamma behaviour for usual superconductors in the presence of paramagnetic impurities. Then, no long-range order can be stabilized above 0.1 K in a narrow window of substitution. Finally, an insulating SDW ground state in ReO4−-rich samples is rapidly stabilized with the decrease of the potential strength leading to the doubling of the transverse periodicity. This extensive study has shown that the superconducting order parameter must change its sign over the Fermi surface.read more
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Superconducting state of the organic conductor (TMTSF)2ClO4.
J. Shinagawa,Y. Kurosaki,Y. Kurosaki,F. Zhang,Colin V. Parker,Colin V. Parker,Stuart Brown,Denis Jérome,Jørn B. Christensen,Klaus Bechgaard +9 more
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Recent Topics of Organic Superconductors
Arzhang Ardavan,Stuart Brown,Seiichi Kagoshima,Kazushi Kanoda,Kazuhiko Kuroki,Hatsumi Mori,Masao Ogata,Shinya Uji,Shinya Uji,Jochen Wosnitza +9 more
TL;DR: In this article, the authors reviewed recent developments in research into superconductivity in organic materials and provided good evidence for magnetically-mediated pairing in BEDT-TTF and BETS superconductors.
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Anomalous in-plane anisotropy of the onset of superconductivity in (TMTSF)2ClO4.
Shingo Yonezawa,Shuichi Kusaba,Yoshiteru Maeno,Pascale Auban-Senzier,Claude Pasquier,K. Bechgaard,Denis Jérome +6 more
TL;DR: The magnetic-field amplitude and field-angle dependence of the superconducting onset temperature Tconset of the organic superconductor (TMTSF)2ClO4 in magnetic fields H accurately aligned to the conductive ab' plane is reported.
References
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Thomas Timusk,B. W. Statt +1 more
TL;DR: The pseudogap is seen in all high-temperature superconductors and there is general agreement on the temperature and doping range where it exists as discussed by the authors, and it is also becoming clear that the superconducting gap emerges from the normal state pseudogaps.
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C. C. Tsuei,John R. Kirtley +1 more
TL;DR: The recent development of phase-sensitive tests, combined with the refinement of several other symmetry-sensitive techniques, has for the most part settled this controversy in favor of predominantly $d$-wave symmetry for a number of optimally hole-and electron-doped cuprates as mentioned in this paper.
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Organic conductors and superconductors
Denis Jérome,H. J. Schulz +1 more
TL;DR: In this article, the authors present the most salient developments of research on organic conductors and superconductors during the past 10 years, including lattice instability in TTF-TCNQ and related compounds, superconducting or antiferromagnetic instabilities in the (TMTSF) 2 X series.
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Stability of the spin density wave phases in (TMTSF)2ClO4 : quantized nesting effect
TL;DR: In this article, the stability of SDW phases in (TMTSF) 2 ClO 4 can be interpreted by simple arguments of anisotropic Fermi surfaces nesting: first, they show that anion ordering, by introducing new Bragg's reflexions, perturbs the nesting and lowers the SDW stability, and then they improve Gor'kov and Lebed's argument on the effect of a magnetic field on nesting by allowing the wave vector Q(H) to adapt to the field so that nesting is quantized.
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Influence of the Cooling Rate on the Superconducting Properties of the Organic Solid Di-Tetramethyltetraselenafulvalenium-Perchlorate, ( TMTSF ) 2 Cl O 4
TL;DR: In this article, specific-heat measurements on the organic solid di-tetramethyltetraselenafulvalenium-perchlorate (TTE-ELena) were obtained and shown that the cooling rate below 40 K is changed from 0.1 K/min (relaxed state) to 10 K/m (quenched state).