论文标题
电流诱导的手性分子转子的机械扭矩
Current-induced mechanical torque in chiral molecular rotors
论文作者
论文摘要
已经为通过电流操作的分子转子而进行了巨大的努力。经常满足的操作原理是从入射通量中取出的角动量的转移。在本文中，我们提出了一种替代驱动剂，该驱动剂也适用于传入通量的角动量的情况。这种情况通常是出现易于旋转轴的分子转子而产生的。对于定量分析，我们在这里研究了一个经典模型，其中分子和电线由刚性弯曲路径表示。我们证明，在有手性的情况下，转子通常会经历定向运动，前提是入射电流超过阈值。高于阈值，螺旋几何形状的相应旋转频率（每次传入的粒子电流）被证明为$2πm/m_1 $，其中$ m/m_1 $是入射托架质量的比例，每个绕组数的质量是螺旋载体的质量。
A great endeavor has been undertaken to engineer molecular rotors operated by an electrical current. A frequently met operation principle is the transfer of angular momentum taken from the incident flux. In this paper we present an alternative driving agent that works also in situations where angular momentum of the incoming flux is conserved. This situation arises typically with molecular rotors that exhibit an easy axis of rotation. For quantitative analysis we investigate here a classical model, where molecule and wires are represented by a rigid curved path. We demonstrate that in the presence of chirality the rotor generically undergoes a directed motion, provided that the incident current exceeds a threshold value. Above threshold, the corresponding rotation frequency (per incoming particle current) for helical geometries turns out to be $2πm/M_1$, where $m/M_1$ is the ratio of the mass of an incident charge carrier and the mass of the helix per winding number.
