The geometric and electronic structure of a molecular layer on the Au(001) surfaces was studied by scanning tunneling microscopy and spectroscopy. The interaction between the substrate and overlayer is strong enough that the monolayer is commensurate and uniaxially stressed along the 〈110〉 direction. As a result of stress the charge density around the molecule appears to be deformed. Charge transfer was observed in ultraviolte photoemission spectroscopy and scanning tunneling spectroscopy, revealing the adsorption mechanism of the molecule on this substrate.
- Received 12 October 1992
©1993 American Physical Society