Abstract
Superconductivity of radical ion salts is now well established in two families of organic conductors: the quasi-one-dimensional (Q-1-D) family, to which the prototype material (TMTSF)2PF6 belongs, with Tc in the one Kelvin range, and the two-dimensional series with Tc up to 10 K, which is illustrated by salts such as (BEDT-TTF)2X i.e. (ET)2X with X = I3, Aul2, Cu(NCS)2, etc... We first recall the instabilities which are inherent to the (TMTTF-TMTSF)2X series, giving, as examples, the behaviour, under pressure, of the newly synthesized mixed sulfur-selenium compound (TMDTDSF)2PF6, and the discovery of a hidden spin density wave (SDW) phase in (TMTSF)2ReO4. Secondly, we present recent experimental results about the quantization of the Hall constant in the field-induced semimetallic states of (TMTSF)2PF6 under pressure, and the observation of giant magnetoresistance oscillations in the high-Tc phase of β-(BEDT-TTF)2I3, illustrating the two-dimensional character of the latter superconductor.
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Jérome, D. (1990). Recent Developments in Organic Superconductors. In: Metzger, R.M., Day, P., Papavassiliou, G.C. (eds) Lower-Dimensional Systems and Molecular Electronics. NATO ASI Series, vol 248. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2088-1_5
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DOI: https://doi.org/10.1007/978-1-4899-2088-1_5
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