To date, temperature and conductivity have many outstanding implications in extreme environments but are yet to be fully understood under high pressure and temperature dynamic conditions. Here, we introduce an approach to provide high quality electrical conductivity results under dynamic loading conditions. Emphasis is given to address the skin depth effect's influence in a dynamic loading experiment by using thin films. The thin film samples in this study were at least 100 times thinner than previous samples in dynamic electrical conductivity experiments, increasing the current density to its full potential across the sample's entire cross section. Consideration of the skin depth accounts for at minimum a $4\times$ scaling factor to the final electrical conductivity result that has been neglected in previous dynamic electrical conductivity studies. We also obtained improved signal-to-noise ratio with custom diagnostics optimized for better electrical impedance matching. These considerations were applied to Sn to assess electrical conductivity at elevated pressure and temperature. The high signal-to-noise ratio with reduced skin depth influence results in Sn allowing observation of the conductivity changes related to solid-to-solid and solid-to-liquid phase transitions. Additionally, we calculate the Sn thermal conductivity using the Wiedemann-Franz law for our experiments and compare against thermal transport dependent temperature measurements from previous work.

中文翻译：

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Sn在高温高压下的电导率

迄今为止，温度和电导率在极端环境中具有许多突出的意义，但在高压和温度动态条件下尚未完全了解。在这里，我们介绍了一种在动态负载条件下提供高质量电导率结果的方法。重点是通过使用薄膜解决动态加载实验中趋肤深度效应的影响。本研究中的薄膜样品在动态电导率实验中至少比之前的样品薄 100 倍，从而将电流密度增加到样品整个横截面的全部电位。考虑趋肤深度至少占$4\times$在之前的动态电导率研究中被忽略的最终电导率结果的比例因子。我们还通过定制诊断获得了更高的信噪比，以实现更好的电阻抗匹配。这些考虑因素应用于 Sn 以评估在升高的压力和温度下的电导率。具有降低趋肤深度影响的高信噪比导致 Sn 允许观察与固-固和固​​-液相转变相关的电导率变化。此外，我们在实验中使用 Wiedemann-Franz 定律计算 Sn 热导率，并与之前工作中的热传输相关温度测量值进行比较。