ELECTRIC AND MAGNETIC PROPERTIES AND PHASE DIAGRAM OF A SERIES OF ORGANIC SUPERCONDUCTORS LAMBDA -BETS2GAXZY4-Z BETS=BIS(ETHYLENEDITHIOTETRASELENAFULV ALENE; X,Y=F, CL, BR; 0
ELECTRIC AND MAGNETIC PROPERTIES AND PHASE DIAGRAM OF A SERIES OF ORGANIC SUPERCONDUCTORS LAMBDA -BETS2GAXZY4-Z BETS=BIS(ETHYLENEDITHIOTETRASELENAFULV ALENE; X,Y=F, CL, BR; 0
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系列有机超导体的电磁性能及相图 LAMBDA -BETS2GAXZY4-Z BETS=BIS(亚乙基二硫代四烯富勒烯; X,Y=F, CL, BR; 0
DOI：
10.1103/physrevb.56.r8526
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发表时间：
1997
影响因子：
3.7
通讯作者：
A. Kobayashi
中科院分区：
文献类型：
--
作者：
H. Kobayashi;H. Akutsu;E. Arai;Hisashi Tanaka;A. Kobayashi
一系列有机超导体的物理性质与四倍quasistacking结构,λ2 X z Y Ga 4−−押注z[注= bis (ethylenedithiotetraselenafulvalene; X, Y = F, Cl, Br; 0 < z < 2))是通过调优z的值不断变化。复合λ2 GaBr z Cl 4−−押注z,有超导基态0 z < z < c(≈0.8)和半导体状态为z < z < 2.0加元。最大t_c约为10 K，表明存在10 K的非ET类有机超导体[ET=双（乙二硫）四硫代烯]。电阻率的温度依赖性与κ型ET超导体非常相似，但磁化率行为不同。λ - bet2gabr 1.5 Cl 2.5的磁化率是各向同性的，在30 K以下急剧下降。在10k时没有观察到自旋-翻边跃迁的迹象，这表明至少在10k以下，与超导相相邻的绝缘相不是反铁磁性的。
The physical properties of a series of organic superconductors with fourfold quasistacking structures, λ− BETS 2 Ga X z Y 4− z [BETS= bis (ethylenedithiotetraselenafulvalene; X, Y= F, Cl, Br; 0< z< 2)] are changed continuously by tuning the value of z. The compound λ− BETS 2 GaBr z Cl 4− z, has a superconducting ground state for 0< z< z c (≈ 0.8) and a semiconducting state for z c< z< 2.0. The maximum T c is about 10 K, showing the existence of a 10-K class of non-ET organic superconductors [ET= bis (ethylenedithio) tetrathiafulvalene]. The temperature dependence of the resistivity closely resembles that for κ-type ET superconductors but the susceptibility behavior is different. The susceptibility of λ− BETS 2 GaBr 1.5 Cl 2.5 is isotropic and decreases fairly sharply below 30 K. No indication of a spin-flop transition was observed at 10 K, suggesting that the insulating phase that neighbors the superconducting phase is not antiferromagnetic at least down to 10 K.