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Transport in Graphene Heterostructures

Speaker: 
Ong Zhun Yong (University of Texas at Dallas)
Date: 
Wed, 10/10/2012 - 3:00pm to 4:00pm
Location: 
S13-M01-11 (Physics Conference Room)
Event Type: 
Other Seminars

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

Abstract

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.

Bio sketch

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.

Host

Prof. Baowen Li
Department of Physics, NUS
Tel: 65-6516 6864
Email: phylibw@nus.edu.sg

 

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