标题： 自旋关联对Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$电阻率和微波吸收的影响 显示英文标题

标题： Impact of spin correlations on resistivity and microwave absorption of Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$

摘要： 报道了通过电阻率和微波吸收测量研究掺钴的BaFe$_2$As$_2$单晶的结果。理论描述了微波吸收幅度的行为，考虑了电阻率、磁化率以及自旋涨落寿命随温度的变化。假设电阻率在$T<100$开尔文时偏离线性温度依赖关系并非与电子-电子散射机制有关，而是由于出现了一种向列涨落。对自旋涨落引起的散射率的估算表明，在接近结构相变的温度附近，这些涨落具有向列性质。 显示英文摘要

摘要： The results of studies of BaFe$_2$As$_2$ single crystals doped with cobalt by means of resistivity and microwave absorption measurement are reported. A theoretical description of the behavior of the microwave absorption amplitude is made taking into account the temperature dependence of resistivity, magnetic susceptibility and the lifetime of spin fluctuations. An assumption has been made that the deviation from the linear dependence of resistivity on temperature at $T<100$ K is not related to the electron-electron scattering mechanism, but it is due to the appearance of nematic fluctuations. Estimates of the rate of scattering by spin fluctuations indicate their nematic nature at temperatures near the structural transition.