非弹性电子隧穿驱动的布朗分子马达动力学模型
A dynamical model for Brownian molecular motors driven by inelastic electron tunneling
摘要：
近年来，人们提出了几种由电流驱动和控制的人造分子马达。类似于布朗机，这些系统的工作原理是将随机的非弹性隧穿事件转化为分子的定向旋转。尽管它们作为未来分子机器的最终组成部分的重要性，它们的建模还没有得到充分的研究。在这里，我们开发了一个动力学模型来描述这些系统。通过将该模型应用于一个著名的分子马达，验证了该模型的有效性和实用性，所得结果与已有的实验数据相一致.此外，我们演示了如何使用我们的模型来提取一些难以访问的微观参数。最后，我们包括一个分析的预期效果的电流感应力（CIF）。我们的分析表明，虽然非保守贡献的CIF可以在某些情况下是重要的，他们似乎并不重要的分析情况。尽管如此，CIF的保守贡献可能足以显著改变系统的动态。
英文摘要：
In recent years, several artificial molecular motors driven and controlled by electric currents have been proposed. Similar to Brownian machines, these systems work by turning random inelastic tunneling events into a directional rotation of the molecule. Despite their importance as the ultimate component of future molecular machines, their modeling has not been sufficiently studied. Here, we develop a dynamical model to describe these systems. We illustrate the validity and usefulness of our model by applying it to a well-known molecular motor, showing that the obtained results are consistent with the available experimental data. Moreover, we demonstrate how to use our model to extract some difficult-to-access microscopic parameters. Finally, we include an analysis of the expected effects of current-induced forces (CIFs). Our analysis suggests that, although nonconservative contributions of the CIFs can be important in some scenarios, they do not seem important in the analyzed case. Despite this, the conservative contributions of CIFs could be strong enough to significantly alter the system's dynamics.
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