Doping of C-60 (sub)monolayers by Fermi-level pinning induced electron transfer

作者：Niederhausen J^*; Amsalem P; Wilke A; Schlesinger R; Winkler S; Vollmer A; Rabe J P; Koch N

来源：Physical Review B, 2012, 86(8): 081411.

DOI：10.1103/PhysRevB.86.081411

Fermi-level pinning of C-60 (sub)-monolayers on a sexithiophene (6T) bilayer grown on Ag(111) is shown to induce electron transfer from the metal to a fraction of the C-60 molecules. The electrostatic potential resulting from the charge transfer process is responsible for a potential drop within the 6T interlayer and, more remarkably, for dipole-dipole repulsion, leading to a disproportionation into coexisting neutral and charged C-60 molecules. We suggest that charge ordering phenomena may occur for such systems.

• 出版日期2012-8-17