Admittance of Au/1,4-benzenedithiol/Ausingle-molecule junctions

作者：Yamauchi Kazumasa; Kurokawa Shu; Sakai Akira^*

来源：Applied Physics Letters, 2012, 101(25): 253510.

DOI：10.1063/1.4772642

Employing the admittance formula for double-barrier junctions [Fu and Dudley, Phys. Rev. Lett. 70, 65 (1993)], we have estimated an ac susceptance (imaginary part of admittance) of Au/1,4-benzenedithiol/Au single-molecule junctions from their current-voltage characteristics. In the MHz regime, we find that the junction susceptance shows a very small (similar to 0.1 aF) capacitive component that can be entirely masked by a larger electrode capacitance. Direct ac signal transmission measurements up to 1 GHz reveal no molecular signals and confirm the smallness of the molecular capacitance in the MHz regime.

• 出版日期2012-12-17