Materials Science Research Lecture

Abstract:  Graphene and two-dimensional (2D) materials community is anxiously waiting for the "killer" electronic application for 2D materials, where the intrinsic properties of 2D materials would enable unique functionality. In the first half of my talk, I will describe a voltage controlled oscillator implemented with three different 2D materials, 1T-TaS2, graphene and h-BN, in a way that exploited the unique characteristics of each, yielding a miniaturized device suitable for a variety of practical applications. The room temperature operation of VCO is based on the charge density wave (CDW) phase transitions in 1T-TaSe2 triggered with a bias voltage at room temperature [1]. Graphene is used as a load matched, voltage tunable resistor, which does not require an energy band gap. In the second half of my talk, I will explain why the research of 2D materials should be extended to the one-dimensional (1D) van der Waals materials. Using transition metal trichalcogenides (TMT) such as TaSe3 we demonstrated prototype "atomic wire" interconnects with the current density of an order-of-magnitude higher than that of copper used in conventional Si CMOS technology [2-3]. [1] G. Liu, et al., Nature Nano, 11, 845 (2016). [2] M. A. Stolyarov, et al., Nanoscale, 8, 15774 (2016). [3] G. Liu, et al., Nano Lett., 17, 377 (2017).

About the Speaker: Alexander A. Balandin received his BS (1989) and MS (1991) degrees Summa Cum Laude in Applied Physics and Mathematics from the Moscow Institute of Physics and Technology (MIPT), Russia. He received his second MS (1995) and PhD (1997) degrees in Electrical Engineering from the University of Notre Dame, USA. From 1997 till 1999, he worked as a Research Engineer at the Department of Electrical Engineering, University of California – Los Angeles (UCLA). In 1999 he joined the Department of Electrical and Computer Engineering, University of California – Riverside (UCR), where he is presently Distinguished Professor of Electrical and Computer Engineering, University of California Presidential Chair Professor of Materials Science and Engineering, Director of the Nano-Device Laboratory (NDL), Director of the Phonon Optimized Engineered Materials (POEM) Center, Associate Director of DOE Energy Frontier Research Center (EFRC) Spins and Heat in Nanoscale Electronic Systems (SHINES) and Interim Director of UCR's Center for Nanoscale Science and Engineering (CNSE) – UCR Nanofabrication Cleanroom. He is a Founding Chair of the campus-wide Materials Science and Engineering (MS&E) Program at UCR. Professor Balandin is a recipient of The MRS Medal (2013) and IEEE Pioneer of Nanotechnology Award (2011) for his graphene, phonon engineering and nanotechnology research. He is an elected Fellow of eight professional societies: MRS, APS, IEEE, OSA, SPIE, IOP, IOM3 and AAAS. He presently serves as Deputy Editor-in-Chief for Applied Physics Letters for nanoscience and nano-engineering fields.

**Refreshments served at 3:30pm in the Spalding Laboratory Lobby.