Complex conductivity of FeSe1–x Te x (x = 0 – 0.5) films
Complex conductivity of FeSe1–x Te x (x = 0 – 0.5) films
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FeSe1–x Te x (x = 0 – 0.5) 薄膜的复电导率
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
A. Maeda
中科院分区：
文献类型：
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作者：
H. Kurokawa;Sota Nakamura;Jiahui Zhao;N. Shikama;Y. Sakishita;Yue Sun;F. Nabeshima;Y. Imai;H. Kitano;A. Maeda
我们测量了低于Tc的FeSe_1-−_xTe_x(x=0-0.5)薄膜的复电导率Tc，结果表明，当向列相有序消失时，超导转变温度T_c急剧升高。由于Fe(Se，Te)的磁穿透深度λ(>；400 nm)长于薄膜的典型厚度(∼)(100 Nm)，我们结合共面-波导-谐振器和腔微扰技术来评估σ的实部和虚部。具有向列相有序的薄膜与不具有向列相有序的薄膜相比，其准粒子散射时间表现出本质上的不同，这表明向列相有序对超导带隙结构有影响。另一方面，无论是否存在向列相，超流体密度n S/m*(∝λ−2)与Tc成正比。这一结果表明，超流体的量对Fe(Se，Te)的Tc的影响比向列有序本身的存在或不存在更大。
We measured the complex conductivity, σ, of the FeSe1−x Te x (x = 0 – 0.5) films below T c which show a drastic increase of the superconducting transition temperature, T c, when the nematic order disappears. Since the magnetic penetration depth, λ (> 400 nm) of Fe(Se, Te) is longer than the typical thickness of the film (∼100 nm), we combined the coplanar-waveguide-resonator- and cavity-perturbation techniques to evaluate both the real and imaginary parts of σ. Films with the nematic order showed a qualitatively different behavior of the quasiparticle scattering time compared with those without the nematic order, suggesting that the nematic order influences the superconducting gap structure. On the other hand, the proportionality between the superfluid density, n s/m* (∝ λ−2), and T c was observed irrespective of the presence or absence of the nematic order. This result indicates that the amount of the superfluid has a stronger impact on T c of Fe(Se, Te) than the presence or absence of the nematic order itself.
影响因子：
41.2
作者：
Burrard-Lucas, Matthew;Free, David G.;Clarke, Simon J.
通讯作者：
Clarke, Simon J.