表面分子单向旋转的热电子激发

Kwan Ho Au-Yeung, Suchetana Sarkar, Tim Kühne, Oumaima Aiboudi, Dmitry A. Ryndyk, Roberto Robles, Franziska Lissel, Nicolas Lorente, Christian Joachim, Francesca Moresco
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引用次数: 0

摘要

为了探索微观可逆性原理的极限,我们研究了金(111)表面分子旋转器单向旋转的热激发和电子隧道激发之间的相互作用。我们发现在一定范围内的中等电压和温度下,加热表面会提高化学吸附的 DMNI-转子的单向旋转速率。在较高电压下,非弹性隧道效应占主导地位,而在高温下,这一过程变得随机。在隧穿过程中的每个电子转移事件中,基态和激发态电子的量子混合都会在分子-转子的激发态电子中产生部分表面热能。因此,热能有助于半经典的单向旋转,而不违背微观可逆性原理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal with Electronic Excitation for the Unidirectional Rotation of a Molecule on Surface
Exploring the limits of the microscopic reversibility principle, we investigated the interplay between thermal and electron tunneling excitations for the unidirectional rotation of a molecule-rotor on the Au(111) surface. We identified a range of moderate voltages and temperatures where heating the surface enhances the unidirectional rotational rate of a chemisorbed DMNI-P rotor. At higher voltage, inelastic tunneling effects dominate while at higher temperature the process becomes stochastic. At each electron transfer event during tunneling, the quantum mixing of ground and excited electronic states brings part of the surface thermal energy in the excited electronic states of the molecule-rotor. Thermal energy contributes therefore to the semi-classical unidirectional rotation without contradicting the microscopic reversibility principle.
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