论文标题
所有现场排放模型都是错误的，$ \ ldots $，但是其中任何一个有用吗？
All field emission models are wrong, $\ldots$ but are any of them useful?
论文作者
论文摘要
现场发射数据通常在诺德海姆图上表示，但最近提出了一个新的经验方程来更好地分析实验。这样的方程是基于墨菲和良好模型的近似值，并且可以预测，只能从数据中提取一个恒定参数$κ$，具体取决于发射极的工作函数。我们将这个经验方程与墨菲和良好模型的模拟进行了比较，以确定近似值的有效性范围以及$κ$与工作函数之间关系的鲁棒性。我们发现，$κ$仅在有限的电场范围内是恒定的，因此很大程度上取决于磁场增强因子。该结果提出了新的经验方程的有用性。
Field emission data are often represented on a Fowler--Nordheim plot but a new empirical equation has been recently proposed to better analyze experiments. Such an equation is based on approximations of the Murphy and Good model and predicts that a constant parameter $κ$, depending only on the work function of the emitter, can be extracted from the data. We compared this empirical equation with simulations of the Murphy and Good model in order to determine the range of validity of the approximations and the robustness of the relationship between $κ$ and the work function. We found that $κ$ is constant only over a limited range of electric fields and so depends significantly on the field enhancement factor. This result calls into question the usefulness of the new empirical equation.
