Transport in Graphene Heterostructures

10/10/2012 @ 3:00 PM – 4:00 PM Asia/Singapore Timezone
S13-M01-11 (Physics Conference Room)

Joint Seminar: Department of Physics & Centre for Computational Science and Engineering

Speaker: Ong Zhun Yong
Affiliation: University of Texas at Dallas
Host: Prof. Baowen Li
Abstract Details: In the modeling of graphene, the substrate is usually regarded as nothing more than a static object providing physical support and a different effective permittivity. However, the properties of graphene are modified through its interaction with the substrate. In the first half of this talk, I discuss carrier scattering by interfacial plasmon-phonons and charged impurities in supported and top-gated graphene. The effect of dielectric material and thickness are analyzed. In the latter half, the lattice and electronic contribution to the Kapitza conductance are presented. In particular, I show how dynamic screening affects the electronic Kapitza conductance.

About the Speaker: The speaker graduated from the National University of Singapore in 2004 with Bachelor of Science (First Class Honours) in physics and computational science. Following a one-year stint in the Institute of Materials Research and Engineering, he entered the doctoral programme of the physics department of the University of Illinois at Urbana-Champaign in 2005 and graduated with a PhD in 2011. He is currently a research associate in the department of materials science and engineering of the University of Texas at Dallas. His research interests are in the theory and simulation of electro-thermal transport in low-dimensional heterostructure materials. Among other things, he has worked on the theory of remote impurity and phonon scattering in graphene heterostructures, the simulation of Kapitza conductance in low-dimensional nanomaterials, the electro-thermal transport through grain boundaries, and experimental and simulation studies of high-field transport in graphene.