Title: Playing with Molecular Junctions - Tales from the South.
When: Monday, October 9, (2017), 15:30.
Place: Department of Condensed Matter Physics, Faculty of Science, Module 3, Seminar Room (5th Floor).
Speaker: Yonatan Dubi, Ben-Gurion University Department of Chemistry & The Ilze-Katz Institute for Nano-Scale Science and Technology, Israel.
The ultimate goal of molecular electronics is to create technologies that will complement—and eventually supersede - Si-based microelectronics technologies. To reach this goal, the field of single-molecule electronics is aiming at recognizing and characterizing single-molecule devices that mimic at least some of the behaviors of today's semiconductor components. In this talk I tell the tale of three such single-molecule devices, including the world’s smallest diode and the symmetric photo-switch, all of which are the fruit of collaboration with the experimental group of B.-Q. Xu. I describe both experimental (to the best of my powers) and theoretical sides of these devices, and elucidate the basic physical processes which are dominating these systems.
1. J. Zhou, S. Samanta, C. Guo, J. Locklinb and B. -Q. Xu, Measurements of contact specific low-bias negative differential resistance of single metalorganic molecular junctions, Nanoscale 5, 5715 (2013).
2. Y. Dubi, Dynamical coupling and negative differential resistance from interactions across the molecule-electrode interface in molecular junctions, J. Chem. Phys. 139, 154710 (2013).
3. B.-Q. Xu and Y. Dubi, invited review: Negative Differential Conductance in Molecular Junctions: An Overview of Experiment and Theory, J. Phys. Condensed Matter 27, 263202 (2015).
4. C. Guo, K. Wang, E. Zerah-Harush, J. Hamill, B. Wang, Y. Dubi, B. Xu, Molecular rectifier composed of DNA with highrectification ratio enabled by intercalation, Nature Chemistry, doi:10.1038/nchem.2480 (AOP, 2016).