论文标题
$κ$ - （bedt-ttf）$ _ 2 $ hg（scn）$ _ 2 $ br的$κ$ _（bedt-ttf）$κ$ - （bedt-ttf）的强烈相关电子的负责波动
Ferromagnetism out of charge fluctuation of strongly correlated electrons in $κ$-(BEDT-TTF)$_2$Hg(SCN)$_2$Br
论文作者
论文摘要
我们对有机$κ$ - （bedt-ttf）$ _ 2 $ hg（scn）$ _ 2 $ br执行磁化敏感性和磁性扭矩测量，最近建议在其低温绝缘阶段托管一个奇特的量子偶极子液体。在金属 - 绝缘体过渡温度下方，磁化率遵循的居里 - 韦斯定律的质量为正质量，并观察到特定的$ m \ propto \ sqrt {h} $曲线。紧急的铁磁相互作用的旋转相当于局部电荷的整个旋转力矩的约1/6。考虑到形成偶极 - 液体的可能不均匀的准充电顺序，我们在两个相邻的电荷有序域中构建了一个抗磁性相互作用的自旋链的模型，该模型通过在边界的mott-dimer上通过波动的电荷耦合。我们发现，电荷波动可以从旋转单线域中抽出弱铁磁矩。
We perform magnetic susceptibility and magnetic torque measurements on the organic $κ$-(BEDT-TTF)$_2$Hg(SCN)$_2$Br, which is recently suggested to host an exotic quantum dipole-liquid in its low-temperature insulating phase. Below the metal-insulator transition temperature, the magnetic susceptibility follows a Curie-Weiss law with a positive Curie-Weiss temperature, and a particular $M\propto \sqrt{H}$ curve is observed. The emergent ferromagnetically interacting spins amount to about 1/6 of the full spin moment of localized charges. Taking account of the possible inhomogeneous quasi-charge-order that forms a dipole-liquid, we construct a model of antiferromagnetically interacting spin chains in two adjacent charge-ordered domains, which are coupled via fluctuating charges on a Mott-dimer at the boundary. We find that the charge fluctuations can draw a weak ferromagnetic moment out of the spin singlet domains.
