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Superconductivity of Organic Charge-Transfer Salts

  • J. WosnitzaEmail author
Article
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Abstract

Forty years after the discovery of the first organic superconductor, the nature of the superconducting state in these materials is still not fully understood. Here, I present an overview on the historical developments and current knowledge on this topic for the quasi-one- and quasi-two-dimensional (2D) organic charge-transfer salts. Thereby, I focus on the prototype materials based on the donor molecules tetramethyltetraselenafulvalene (TMTSF) and bisethylenedithio-tetrathiafulvalene (BEDT-TTF or ET for short). 2D organic superconductors based on the latter molecule are found to show Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) states at high magnetic fields and low temperatures. Thermodynamic and nuclear magnetic resonance data give robust evidence for the existence of this FFLO state with modulated order parameter.

Keywords

Organic superconductors Nature of superconductivity FFLO state 

Notes

Acknowledgements

This work was supported by HLD at HZDR, member of the European Magnetic Field Laboratory (EMFL), and by the Deutsche Forschungsgemeinschaft (DFG) through the ANR-DFG Grant “Fermi-NESt” (WO444/13-1).

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Authors and Affiliations

  1. 1.Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmatHelmholtz-Zentrum Dresden-RossendorfDresdenGermany

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