Superconductivity and Metal–Insulator Transition in Twin-Columnar Organic Superconductor, (BETS)2(X2TCNQ)[X=Cl, Br]
Superconductivity and Metal–Insulator Transition in Twin-Columnar Organic Superconductor, (BETS)2(X2TCNQ)[X=Cl, Br]
复制标题
双柱状有机超导体中的超导性和金属-绝缘体转变，(BETS)2(X2TCNQ)[X=Cl, Br]
DOI：
10.1143/jpsj.70.3023
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发表时间：
2001
影响因子：
1.7
通讯作者：
Toshihiro Takahashi
中科院分区：
文献类型：
--
作者：
R. Kondo;T. Hasegawa;T. Mochida;S. Kagoshima;Y. Iwasa;K. Hiraki;Toshihiro Takahashi
利用电阻率和1h NMR实验研究了首个全有机供体-受体型超导体系（BETS） 2 (x2 TCNQ) [X=Cl， Br]在高压下的低温电子性质。这类配合物的晶体结构在室温下为双柱状结构，无柱内二聚化现象。建立了这些化合物的压力-温度相图，其中电子基态是自旋密度波（SDW）绝缘体，除了（BETS） 2 （Cl 2 TCNQ）中超导态的狭窄区域。从静水压力效应和化学取代效应的角度讨论了标题化合物电子态的可能统一图。
Low-temperature electronic properties of the first all-organic donor-acceptor-type superconducting system, (BETS) 2 (X 2 TCNQ) [X=Cl, Br] under high pressure have been investigated by means of resistivity and 1 H NMR experiments. The crystal structure of this class of complexes is characterized by a twin-columnar structure of BETS without intra-columnar dimerization at room temperature. Pressure-temperature phase diagrams are established for these compounds, where the electronic ground states are spin-density-wave (SDW's) insulators, except a narrow region of superconducting state in (BETS) 2 (Cl 2 TCNQ). A possible unified picture of the electronic states of the title compounds is discussed in terms of hydrostatic pressure effects and chemical substitution ones on them.