Electronic tuning of dynamical charge transfer at an interface: K doping of C-60/Ag(111)

被引：59

作者：

Peremans, A ^{[1
]}

Caudano, Y ^{[1
]}

Thiry, PA ^{[1
]}

Dumas, P ^{[1
]}

Zhang, WQ ^{[1
]}

LeRille, A ^{[1
]}

Tadjeddine, A ^{[1
]}

机构：

[1] LAB UTILISAT RAYONNEMENT ELECTROMAGNET, F-91405 ORSAY, FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.78.2999

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-resolution vibrational spectroscopy of fullerene thin films is achieved by sum-frequency generation and infrared absorption. The A(g)(2) mode of C-60 gains strong infrared activity when the molecule is adsorbed on Ag(lll). K doping allows us to demonstrate the process of adsorbate/substrate dynamical charge transfer, by showing, for the first time, the quenching of the mode softening and infrared activity upon tuning of the admolecule electronic properties. These observations enable the quantitative evaluation of the coupling strength of the A(g)(2) vibration to the t(1u) orbital of C-60.

引用

页码：2999 / 3002

页数：4

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