论文标题
旋转液体候选$κ$ - （ET）$ _ 2 $ cu $ _2 $（CN）$ _ 3 $ _ 3 $在6 k下于6 k显示，$^{63} $ CU NQR测量
Charge disproportionation in the spin-liquid candidate $κ$-(ET)$_2$Cu$_2$(CN)$_3$ at 6 K revealed by $^{63}$Cu NQR measurements
论文作者
论文摘要
自旋液体候选$κ$ - （ET）$ _ 2 $ _ 2 $ _2 $（CN）$ _ 3 $ [et：bis（etyylenedithio）tetrathiafulvalene]并未表现出磁性命令，以降低到非常低的温度，但在6 K中显示了一个神秘的Anomaly。我们在绝缘层的铜部位进行了核四极共振（NQR）测量，这对电荷动力学敏感，与常规的SPIN-1/2核磁共振（NMR）不同。这项研究的主要发现是，在核旋转晶状放松率中观察出尖锐的峰值行为$ t_1^{ - 1} $的$^{63} $ cu nqr在6 K时，而$ t_1^{ - 1} $ of两种$^{13} $ c和$^{1} $ c and $^{1} $^{1} $ h nmr show no Clear no Clear show no Clear。这种行为可以理解为与ET层中电荷差成比例有关的二阶相变。
The spin-liquid candidate $κ$-(ET)$_2$Cu$_2$(CN)$_3$ [ET: bis(ethylenedithio)tetrathiafulvalene] does not exhibit magnetic ordering down to a very low temperature, but shows a mysterious anomaly at 6 K. The origin of the so-called 6 K anomaly is still under debate. We carried out nuclear quadrupole resonance (NQR) measurements on the copper sites of the insulating layers, which are sensitive to the charge dynamics unlike the conventional spin-1/2 nuclear magnetic resonance (NMR). The main finding of this study is that the observation of a sharp peak behavior in the nuclear spin-lattice relaxation rate $T_1^{-1}$ of $^{63}$Cu NQR at 6 K while $T_1^{-1}$ of both $^{13}$C and $^{1}$H NMR show no clear anomaly. This behavior can be understood as a second-order phase transition related to charge disproportionation in the ET layers.
