StressedC60layers on Au(001)

Abstract

The geometric and electronic structure of a ${\mathrm{C}}_{60}$ 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 ${\mathrm{C}}_{60}$ monolayer is commensurate and uniaxially stressed along the 〈110〉 direction. As a result of stress the charge density around the ${\mathrm{C}}_{60}$ molecule appears to be deformed. Charge transfer was observed in ultraviolte photoemission spectroscopy and scanning tunneling spectroscopy, revealing the adsorption mechanism of the ${\mathrm{C}}_{60}$ molecule on this substrate.