We present the results of a ^{1}H NMR study of the single-component molecular conductor, [Au(tmdt)_{2}].
A steep increase in the NMR line width and a peak formation of the nuclear spin-lattice relaxation rate, 1/T_{1}, were observed at around 110 K.
This behavior provides clear and microscopic evidences for a magnetic phase transition at considerably high temperature among organic conductors.
The observed variation in 1/T_{1} with respect to temperature indicates the highly correlated nature of the metallic phase.
Site-Selective NMR in the Quasi-1D Conductor beta-Sr0.33V2O5
我们报告51 V NMR实验中的金属相的准一维(1D)导体β-Sr 0. 33V2O5。的奈特位移和四极分裂的所有六个钒网站被确定为一个功能的磁场的方向垂直于导电的b轴。三个一维结构单元的磁性是显着的异质性。特别地,V2梯单元在两个(V2a和V2b)位点之间显示出明显的电荷分离。在其中一个位置,Knight位移和1/(T1T)的绝对值随着温度的降低而急剧增加,表明铁磁相关的发展。
Site-specific $^{13}$C NMR study on locally distorted triangular lattice of organic conductor $κ$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$
为了验证几何挫折的影响,我们人为扭曲的三角形晶格准二维有机导体$κ$ -(BEDT-TTF)$_2$铜$_2$(CN)$_3$ [BEDT-TTF:双(亚乙基二硫代)四硫富瓦烯]通过类似的分子取代和应用$^{13}$ C NMR的散装和取代的网站,电导率,静态磁化率测量。结果表明,取代样品的磁特性与纯样品的磁特性在数量上相似。此外,在替代位置处的磁特性也与体中相同。这些结果表明,所观察到的磁性可能不是由于几何挫折,但无序的重要性。
$^{13}$C NMR observation of a nonmagnetic charge-ordered state in the organic conductor $κ$-(ET)$_{2}$Hg(SCN)$_{2}$Cl
University of Tokyo(东京大学);The Institute for Solid State Physics, University of Tokyo(东京大学固体物理研究所);Institute of Problems of Chemical Physics RAS(俄罗斯科学院化学物理问题研究所);The Institute for Quantum Matter and the Department of Physics and Astronomy, The Johns Hopkins University(约翰斯·霍普金斯大学量子物质研究所及物理与天文学系);Max Planck Institute for Solid State Research(马克斯·普朗克固体研究所);University of Stuttgart(斯图加特大学);Department of Advanced Materials Science, University of Tokyo(东京大学先进材料科学系)
Dynamics of ethylene groups and hyperfine interactions between donor and anion molecules in $λ$-type organic conductors studied by $^{69,71}$Ga-NMR spectroscopy
Charge fluctuations and superconductivity in organic conductors: the case of $β"$-(BEDT-TTF)$_2$SF$_5$CH$_2$CF$_2$SO$_3$
对全有机电荷转移盐$^{13}$-(BEDT-TTF)$_2$ SF $_5$ CH $_2$ CF $_2$ SO $_3$的正常态和超导态进行了$^{13}$ C NMR研究。我们发现,正常状态是一个电荷有序的金属配置为垂直条纹,由1/4填充,相关性,和一个极性counterpartial子晶格的组合。与超导态相关的NMR性质与能隙节点和单线态配对一致,因此与其他有机超导体相似。然而,非常明显的是,没有证据表明$T>T_c=4.5$ K存在低能反铁磁自旋涨落。这两个方面进行了讨论的背景下,该化合物中的配对是由电荷波动驱动的建议。
Mott Transition from a Spin Liquid to a Fermi Liquid in the Spin-Frustrated Organic Conductor kappa-(ET)2Cu2(CN)3
用$^1$ H NMR和电阻率测量研究了三角晶格自旋液体模型体系$κ$ -(ET)$_2$ Cu $_2$(CN)$_3$的压温相图.在压力下,自旋液相在莫特转变为金属或超导相之前是持久的。在Mott转变时,自旋涨落被迅速抑制,自旋-晶格弛豫速率和电阻率随温度的变化具有费米液体特征。相图中Mott边界的特征曲率反映了自旋阻挫对Mott相变的重要影响。
Volatile resistive-switched state in a bulk organic conductor with a sharp metal-insulator transition
Tokyo University of Science(东京科学大学);National Institute for Materials Science (NIMS)(国立材料研究所);Japan Science and Technology Agency (JST)(日本科学技术振兴机构);RIKEN Center for Emergent Matter Science (CEMS)(理化学研究所新兴物质科学中心);Institute of Science Tokyo(东京科学大学);RIKEN, Cluster for Pioneering Research (RIKEN-CPR)(理化学研究所前沿研究集群)