Single-molecule junctions with strong molecule-electrode coupling.
We fabricated Au-TTF-Au (tetrathiafulvalene, TTF) and Au-TSF-Au (tetraselenafulvalene, TSF) single-molecule junctions using a nanofabricated mechanically controllable break junction. We found that Au-TSF-Au and Au-TTF-Au single-molecule junctions have one and two stable configurations, respectively, and that the Au-TTF-Au single-molecule conductance is larger than that of Au-TSF-Au. The difference in single-molecule conductances of the two types of junctions originates from the difference in the strength of the molecule-electrode coupling through face-to-face overlapping configurations.
Taniguchi
Masateru
M
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan. taniguti@sanken.osaka-u.ac.jp
Tsutsui
Makusu
M
Shoji
Kohei
K
Fujiwara
Hideki
H
Kawai
Tomoji
T