论文标题
通过非弹性X射线散射探测的基于铁的超导体的列非相关长度
Nematic correlation length in iron-based superconductors probed by inelastic x-ray scattering
论文作者
论文摘要
nematicity在高$ T_C $超导体的电子相中无处不在，尤其是在基于FE的系统中。 We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length $ξ$ from the anomalous softening of acoustic phonon modes in FeSe, underdoped Ba(Fe$_{0.97}$Co$_{0.03}$)$_2$As$_2$ and optimally doped ba（fe $ _ {0.94} $ co $ _ {0.06} $）$ _ 2 $ as $ _2 $。在所有情况下，我们都会发现$ξ$由Power Law $（t-t_0）^{ - 1/2} $很好地描述，该温度范围内延伸。我们将这种平均场行为和扩展的波动归因于相当大的Nemato弹性耦合，这可能不利于超导性。
Nematicity is ubiquitous in electronic phases of high-$T_c$ superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length $ξ$ from the anomalous softening of acoustic phonon modes in FeSe, underdoped Ba(Fe$_{0.97}$Co$_{0.03}$)$_2$As$_2$ and optimally doped Ba(Fe$_{0.94}$Co$_{0.06}$)$_2$As$_2$. In all cases, we find that $ξ$ is well described by a power law $(T-T_0)^{-1/2}$ extending over a wide temperature range. We attributed this mean-field behavior and the extended fluctuation regime to a sizable nemato-elastic coupling, which may be detrimental to superconductivity.
