ESR Properties of κ-Type Organic Superconductors Based on BEDT-TTF

ESR Properties of κ-Type Organic Superconductors Based on BEDT-TTF
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基于BEDT-TTF的κ型有机超导体的ESR特性

DOI:
10.1143/jpsj.63.4110
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发表时间:
1994
影响因子:
1.7
通讯作者:
Takehiko Mori
Takehiko Mori
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Toshikazu Nakamura;Tomoko Nobutoki;Toshihiro Takahashi;G. Saito;H. Mori;Takehiko Mori

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对κ型BEDT-TTF超导体的电子自旋共振(ESR)特性、自旋磁化率(χ spin )、峰峰值线宽(Δ H pp )和g值进行了系统研究,以阐明其正常状态下的电子结构。 κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Br(空间群:Pnma)和κ'-(BEDT-TTF) 2 Cu 2 (CN) 3 (P2 1 /c)沿所有晶轴具有几乎与温度无关的g值。另一方面,当沿磁场施加电场时,空间群为 P2 1 、κ-(BEDT-TTF) 2 Cu(NCS) 2 、κ-(BEDT-TTF) 2 Cu(CN)[N(CN) 2 ] 和 κ-(BEDT-TTF) 2 Ag(CN) 2 ·H 2 O 的盐在低于约 130 K 时表现出 g 位移的异常增强。 b轴 在二维导电平面中。同时,观察到线宽迅速变宽。我们讨论了 P2 1 空间群化合物的 g 值反常温度依赖性的可能机制。
A systematic investigation of electron spin resonance (ESR) properties, the spin susceptibility (χ spin ), peak-to-peak linewidth (Δ H pp ) and g -value, of κ-type BEDT-TTF superconductors has been carried out in order to clarify their electronic structures in the normal state. κ-(BEDT-TTF) 2 Cu[N(CN) 2 ]Br (Space group: Pnma) and κ'-(BEDT-TTF) 2 Cu 2 (CN) 3 (P2 1 /c) have almost temperature independent g -values along all the crystal axes. On the other hand, the salts with space group of P2 1 , κ-(BEDT-TTF) 2 Cu(NCS) 2 , κ-(BEDT-TTF) 2 Cu(CN)[N(CN) 2 ] and κ-(BEDT-TTF) 2 Ag(CN) 2 ·H 2 O, were found to show an anomalous enhancement of g -shift below about 130 K when the field was applied along the b axis in the two-dimensional conducting plane. Simultaneously, a rapid broadening of the linewidth has been observed. We discuss possible mechanisms of the anomalous temperature dependence of the g -value for the compounds of the P2 1 space group.
κ-(d8-ET)2Cu[N(CN)2]Br 中的超导-反铁磁转变
DOI: --
发表时间: 2018
期刊:
影响因子: --
作者:
小澤宏彬;岡野修樹;小林拓矢;道村真司;谷口弘三;佐藤一彦
通讯作者: 佐藤一彦