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Reliable determination of vortex parameters from measurements of the microwave complex resistivity

机译：通过测量微波复电阻率来可靠地确定涡旋参数

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We discuss and propose a complete data treatment, in close contact to typical microwave experimental data, in order to derive vortex parameters, such as pinning constant and viscous drag coefficient (also referred to as "vortex viscosity"), in a way as model independent as possible. We show that many of the accepted models for the complex resistivity can be described by a single, very general analytical expression. Using typical measurements of real and imaginary resistivity as a function of the applied field, we show that, even for single-frequency measurements, it is always possible to obtain (a) estimates of viscous drag coefficient and pinning constant with well-defined upper and lower bounds and (b) quantitative information about thermal creep. It turns out that neglecting thermal creep, in particular and counterintuitively at low temperatures, might result in a severe overestimation of the viscous drag coefficient. We also discuss the impact of thermal creep on the determination of the pinning constant. The present results might lead to a reconsideration of several estimates of the vortex parameters.
机译：我们讨论并提出一种与典型微波实验数据紧密接触的完整数据处理方法，以便以与模型无关的方式得出涡旋参数，例如钉扎常数和粘性阻力系数（也称为“涡旋粘度”）。尽可能。我们表明，可以通过一个非常通用的分析表达式来描述许多公认的复电阻率模型。使用实际和虚构电阻率的典型测量值作为外加电场的函数，我们表明，即使对于单频测量，也始终可以获得（a）粘滞阻力系数和钉扎常数的估计值，并具有明确定义的上限和下限。下界和（b）有关热蠕变的定量信息。事实证明，忽略热蠕变，尤其是在低温下违反直觉，可能会导致对粘性阻力系数的严重高估。我们还将讨论热蠕变对钉扎常数确定的影响。目前的结果可能导致重新考虑涡旋参数的几种估计。

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