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Journal Article

Seeing molecular orbitals


Pascual,  José Ignacio
Departamento de Fı́sica de la Materia Condensada, C-III, and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid;
Fritz Haber Institute, Max Planck Society;

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Pascual, J. I., Gómez-Herrero, J., Rogero, C., Baró, A., Sánchez-Portal, D., Artacho, E., et al. (2000). Seeing molecular orbitals. Chemical Physics Letters, 321(1-2), 78-82. doi:10.1016/S0009-2614(00)00337-7.

Cite as: http://hdl.handle.net/21.11116/0000-0009-3DA8-6
We present results on a well known system, C60 on Si(111)(7×7), which show that the scanning tunneling microscope (STM) is probing a single molecular orbital (MO). This MO, after comparison of experimental intramolecular structure with ab initio calculations, arises from the highest occupied MO (HOMO). The adsorbed molecules keep their relevant electronic identity but suffer a decrease in their icosahedral symmetry. The nature of the chemical bonding is proposed as being responsible for selecting one single MO in the imaging mechanisms. Our results represent an example of a strongly interacting system that can be interpreted with a great level of detail, overcoming substrate complexities.