In this work, we aim to demonstrate the potential of the flux flow instability (FFI) tool as a probe for the evaluation of the quasiparticle energy relaxation time τ ϵ in iron-based superconductors (IBS). The knowledge of this microscopic parameter, its temperature dependence and the magnetic field influence, turns particularly useful to implement IBS materials in photon detection applications, as well as to get information on the gap symmetry or its anisotropy. Here, we focus on Fe(Se,Te) thin films that both from structural and magnetic properties show the simpler behaviour, thus it can be a reference test for any more complex IBS. By current-voltage characterizations and resistance measurements, we investigate the FFI features in the presence of an external applied magnetic field as a function of the angular dependence between the crystal structure of the film and the orientation of the field. We describe the observed experimental characteristics of FFI with...

中文翻译：

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磁通流不稳定性作为铁硫属化物中准粒子能量弛豫时间的探针

在这项工作中，我们旨在证明通量流动不稳定性（FFI）工具的潜力，作为评估铁基超导体（IBS）中准粒子能量弛豫时间τa的探针。该微观参数的知识，其温度依赖性和磁场影响对于在光子检测应用中实施IBS材料以及获得有关间隙对称性或其各向异性的信息特别有用。在这里，我们集中于Fe（Se，Te）薄膜，这些薄膜从结构和磁性方面都表现出更简单的行为，因此它可以作为任何更复杂的IBS的参考测试。通过电流-电压表征和电阻测量，我们研究了在外部施加磁场的情况下FFI的特性，该特性是薄膜的晶体结构与电场方向之间的角度依赖性的函数。我们描述了观察到的FFI的实验特性...