標題: | Effects of Current-Induced Forces on Pt-Benzene-Pt Single-Molecule Junctions |
作者: | Hsu, Bailey C. Amanatidis, Ilias Liu, Wei-Lin Tseng, Allen Chen, Yu-Chang 電子物理學系 Department of Electrophysics |
公開日期: | 6-二月-2014 |
摘要: | From first-principles approaches, we investigate the torque exerted by the current-induced forces in a highly asymmetric molecular junction, where the benzene molecule is directly connected to the platinum electrodes. We observe that the curved flow of the current streamline around the tilted molecule can induce a net torque, which tends to rotate the benzene molecule, much like the way a stream of water rotates a waterwheel. The magnitude and direction of the net torque are determined by the detailed current density flowing through the molecular junction. Such an asymmetric molecular junction could offer an experimentally practical system for the exploration of an electrically controllable single-molecule motor. The idea given above is also supported by a simple physical model based on the Landauer-Buttiker formula in the tight-binding framework. |
URI: | http://dx.doi.org/10.1021/jp4073284 http://hdl.handle.net/11536/23794 |
ISSN: | 1932-7447 |
DOI: | 10.1021/jp4073284 |
期刊: | JOURNAL OF PHYSICAL CHEMISTRY C |
Volume: | 118 |
Issue: | 5 |
起始頁: | 2245 |
結束頁: | 2252 |
顯示於類別: | 期刊論文 |