解説
分子性超伝導体の開発
斎藤 軍治
応用物理, 第64巻,
第4号, pp.318-324 (1995)
Tc=0.9Kの有機物がTMTSF分子を用いて1980年に発見されたのち,Tcは1988年に
BEDT-TTFT(ET)系で10Kを越え,1991年にはC60系で30K以上に上昇した.
C60分子を純粋な有機物と定義できないこともあり,
これらの超伝導体を分子性超伝導体と総称する.
これまで開発された70種以上の分子性超伝導体はすべて電荷移動錯体であり,
伝導成分に基づいて12系統に分類される.
この解説では,主に,
分子性超伝導体の歴史的展開に基づいた分子設計・物質開発を記述し,
一次元性のTMTSF系,二次元性のET系,
三次元性のC60系超伝導体の構造と物性について概説する.
Gunzi SAITO
OYO BUTURI,
vol.64,
No.4, pp.318-324 (1995)
Since the discovery of the first organic superconductor based on TMTSF
in 1980 (Tc=0.9K at 1.2GPa),
Tc has exceeded 10K for the superconductor based on BEDT-TTF molecule
in 1988 and 30K for that based on C60 molecule in 1991.these superconductors,
including that based on C60,
are termed molecular superconductors.
More than 70 molecular superconductors so far prepared are of charge-transfer
type and are classified into 12 families on the basis
of the conducting component molecules,
This paper describes mainly the design of molecular superconductors
with the historical background,
and the structural and physical aspects of one-dimensional (BEDT-TTF family)
and three-dimensional (C60 family) superconductors are briefly described.
Keywords : molecular (organic) superconductor, molecular design,
charge-transfer complex, TMTSF BEDT-TTF, C60, dimensionality,
one (two, three) - dimensional superconductor