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Superconducting and Normal State Properties of Organic Metals β- (Bedt-Ttf)2X

Published online by Cambridge University Press:  25 February 2011

M. Tokumoto
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
N. Kinoshita
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
K. Murata
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
H. Bando
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
H. Anzai
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
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Abstract

Recent progress on the superconducting and normal state properties characteristic to the organic metals β-(BEDT-TTF)2X are presented. Out of a systematic study on the β-(BEDT-TTF)2X salts, including β-(BEDT-TTF)2 trihalide mixed crystals, with the superconducting transition temperature (Tc) varying from 8 K to below 1 K, empirical rules for various factors governing the Tc in this class of organic metals have been extracted. In addition to the low- and high-Tc states, with Tc=l K and 8 K, respectively, a new superconducting state with Tc=2 K was found in α-(BEDT-TTF)2I3. A particular attention is paid for the correlation between Tc and resistivity. In addition, a correlation between Tc and the anisotropy of coherence length is also considered.

Type
Research Article
Copyright
Copyright © Materials Research Society 1990

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References

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