Vibrational Kondo Effect in Pure Organic Charge-Transfer Assemblies
Vibrational Kondo Effect in Pure Organic Charge-Transfer Assemblies
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DOI：
10.1103/physrevlett.101.217203
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发表时间：
2008-11-21
影响因子：
8.6
通讯作者：
Pascual, J. I.
中科院分区：
文献类型：
--
作者：
Fernandez-Torrente, I.;Franke, K. J.;Pascual, J. I.
用扫描隧道显微镜在生长在金属表面的纯有机电荷转移盐的单分子层上观察到近藤共振。Kondo异常分析表明，薄膜的电子受体具有自旋1/2基态，这是由于在共轭最低未占据分子轨道上定位了一个不成对电子。由于分子状态的π特征，未配对电子与分子振动强烈耦合，导致振动边带中近藤共振的分裂。
A Kondo resonance has been observed using a scanning tunneling microscope on a single molecular layer of a purely organic charge-transfer salt grown on a metal surface. Analysis of the Kondo anomaly reveals that the electron acceptor of the film possesses a spin-1/2 ground state due to the localization of an unpaired electron in the conjugated lowest unoccupied molecular orbital. Because of the pi character of this molecular state the unpaired electron is strongly coupled to molecular vibrations, leading to the split of the Kondo resonance in vibrational sidebands.