Fano interference in single-molecule transistors
Abstract
Quantum interference has been intensively pursued in molecular electronics to investigate and utilize coherent electron transport at the ultra-small level. An essential type of quantum interference with drastic destructive-constructive switching, known as Fano interference, has been widely reported in various kinds of nanoelectronics electronic systems, but not yet been electrostatically gating in a single-molecule device. Here, we fabricate the three-terminal single-molecule transistors based on the molecule with a long backbone and a side group to demonstrate the gate-controllable Fano interference. By applying bias and gate voltages, the two-dimensional differential conductance map shows the noncentrosymmetrical Fano patterns. Combined with the electron transport model and the first principles calculations, the resonant parameters of the Fano interference can unveil the coupling geometry of the junction and the spatial distribution of the resonant states. Our findings provide an instrumental method to induce and utilize the quantum interference behaviors at the molecular level.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (19)
Yiping Ouyang
National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University 1 , Nanjing 210093,
Rui Wang
Zewen Wu
Deping Guo
College of Physics and Electronic Engineering, Center for Computational Sciences, Sichuan Normal University 1 , Chengdu 610101,
Yang-Yang Ju
College of Materials Science and Engineering
Jun Chen
Minhao Zhang
Danfeng Pan
School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University 6 , Nanjing 210023,
Xuecou Tu
Shuai Zhang
Lin Kang
Jian Chen
Peiheng Wu
Xuefeng Wang
Beijing National Laboratory for Condensed Matter Physics
Jianguo Wan
National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University 2 , Nanjing 210093,
Wei Ji
Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, School of Physics
Xianghua Kong
Anhui Province Key Laboratory of Value-Added Catalytic Conversion and Reaction Engineering, School of Chemistry and Chemical Engineering
Yuan-Zhi Tan
State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering
Fengqi Song