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Design of Organic Superconductors Based on Bedt-TTF

Published online by Cambridge University Press:  25 February 2011

Gunzi Saito ,
Tokutaro Komatsu ,
Toshikazu Nakamura  and
Hideki Yamochi
Gunzi Saito
Affiliation:
Department of Chemistry, Faculty of Science, Kyoto University Sakyo-ku, Kitashirakawa, Kyoto 606–01, Japan
Tokutaro Komatsu
Affiliation:
Department of Chemistry, Faculty of Science, Kyoto University Sakyo-ku, Kitashirakawa, Kyoto 606–01, Japan
Toshikazu Nakamura
Affiliation:
Department of Chemistry, Faculty of Science, Kyoto University Sakyo-ku, Kitashirakawa, Kyoto 606–01, Japan
Hideki Yamochi
Affiliation:
Department of Chemistry, Faculty of Science, Kyoto University Sakyo-ku, Kitashirakawa, Kyoto 606–01, Japan
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Abstract

A close examination of the relation between Tc and structural characteristics of BEDT-TTF superconductors has revealed that there is a good correlation between the effective volume (VeffαVc-Vanion and Tc but no such correlation between the unit cell volume (Vc) and Tc. In order to increase Veff, it is favorable to use big but thin anion which can form a thin two-dimensional anion layer. Three-dimensional donor interactions are critical to have sizable Tc. According to the designing, two new superconductors; K-(BEDT-TTF)2CuCN[N(CN)2] (Tc=11.2K) and K'-(BEDT-TTF)2Cu2(CN)3 (Tc=3.8K), are prepared and their physical and structural properties are described. Their Tc's are discussed in terms of veff.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 483
Copyright
Copyright © Materials Research Society 1992

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References

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