论文标题
$ _ {1.91} $ ni $ _ {0.09} $ as $ _ {2} $ film的光学和隐藏传输属性
Optical and Hidden Transport Properties of BaFe$_{1.91}$Ni$_{0.09}$As$_{2}$ Film
论文作者
论文摘要
光谱法用于研究BAFE $ _ {1.91} $ ni $ _ {0.09} $的电动力学和隐藏传输属性，为$ _ {2} $薄超导膜。我们使用带有两个drude组件的Drude-Lorentz模型分析了正常状态数据：一个狭窄（$ d_1 $）和另一个宽带（$ d_2 $）。在超导状态下，$2δ_{0}^{（2）}/k_bt_c = 1.9 $ - 2.0和$2Δ__{0}^{（1）}/k_bt_c = 4.0 $ - 4.3是由狭窄的零件$ d_1 $ bot Broad Component $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2 $ d_2。狭窄的drude成分的膜的总直流电阻率和低温散射速率显示出隐藏的费米 - 液体行为。相对于超导状态的正常状态，总电子玻色子耦合（$λ_{tot} $）和代表性能量（$ω_{0} $）的变化是其他基于铁的材料以及高温超导（HTSC）cup的典型的。
Optical spectroscopy was used to study the electrodynamics and hidden transport properties of a BaFe$_{1.91}$Ni$_{0.09}$As$_{2}$ thin superconducting film. We analyzed the normal state data using a Drude-Lorentz model with two Drude components: one narrow ($D_1$) and another broad one ($D_2$). In the superconducting state, two gaps with $2Δ_{0}^{(2)}/k_BT_c=1.9$--2.0 and $2Δ_{0}^{(1)}/k_BT_c=4.0$--4.3 are formed from the narrow component $D_1$ while the broad component $D_2$ remains ungapped. The calculated total DC resistivity of the film and the low-temperature scattering rate for the narrow Drude component show a hidden Fermi-liquid behavior. The change of total electron-boson coupling ($λ_{tot}$) and representative energy ($Ω_{0}$) in the normal state with respect to the superconducting state is typical of other iron-based materials as well as high-temperature superconducting (HTSC) cuprates.
