Presentation Information
[20p-D903-10]Charge Transport Properties of Higher Fullerene Single-Molecule Junctions
〇Aoshi Yamane1, Shintaro Fujii1, Tomoaki Nishino1 (1.Tokyo Tech.)
Keywords:
single-molecule junction,higher fullerene,molecular electronics
We fabricated C70 single-molecule junctions (SMJs) by the scanning tunneling microscopy-based break junction (STM-BJ) technique and investigated the junction structures and the charge transport properties.
First, we performed conductance measurements and observed two conductance states (H and L states) during the rupture process. DFT simulations suggest that the conductance jump from H state to L state is due to the structural change in which C70 moves from the sides of the electrodes to the gap between them. Next, we performed I-V measurements and obtained the electronic structures of the C70 SMJs based on the resonant level model. The results show that the difference in conductance between the two states is due to the decrease in the metal-molecule coupling.
In conclusion, we clarified the change of the junction geometry and the electronic state of C70 SMJs during the rupture process by measuring the conductance and I-V characteristics. These results show that the charge transport properties of C70 SMJs can be mechanically controlled.
First, we performed conductance measurements and observed two conductance states (H and L states) during the rupture process. DFT simulations suggest that the conductance jump from H state to L state is due to the structural change in which C70 moves from the sides of the electrodes to the gap between them. Next, we performed I-V measurements and obtained the electronic structures of the C70 SMJs based on the resonant level model. The results show that the difference in conductance between the two states is due to the decrease in the metal-molecule coupling.
In conclusion, we clarified the change of the junction geometry and the electronic state of C70 SMJs during the rupture process by measuring the conductance and I-V characteristics. These results show that the charge transport properties of C70 SMJs can be mechanically controlled.