Presentation Information
[9a-B32-11]Electronic Switching and Thermoelectric Characterization of Quantum-Interference-Based Single-Molecule Junctions
〇Shunsuke Nakamura1, M. Teresa Gonzalez2, Hector Vazquez3, Tomoaki Nishino1, Juan Cuerva4, Shintaro Fujii1 (1.Science Tokyo, 2.IMDEA Nanociencia, 3.Czech Aca. of Sci., 4.Granada Univ.)
Keywords:
nanodevice,thermopower
In this study, we aimed to realize a single-molecule electronic switch based on destructive quantum interference (DQI). To this end, we investigated a bent oligophenylene ethynylene derivative (m-OPE) with two types of anchoring sites using conductance measurements and thermopower measurements based on the STM-BJ method. Compared with the para-type analogue, p-OPE, the conductance of the junctions expected to exhibit DQI was found to be more than two orders of magnitude lower. In addition, the absolute value of the Seebeck coefficient was significantly larger, suggesting that the conductance suppression originates from DQI.