[institut] SCL seminar, petak 26. juli, Irena Knezevic

[Darko Tanaskovic]

Поштоване колегинице и колеге,

Позивам вас на семинар који ће у петак 26. јуlа 2013. године у 14:00 у 
читаоници Института за физику да одржи Ирена Кнежевић (Electrical and 
Computer Engineering
University of Wisconsin – Madison, USA). Наслов семинара је:

Graphene Plays Dirty: How Impurites and Imperfections Affect the 
Physics of Graphene Nanostructures


Graphene, a single sheet of graphite, is a material with a 
two-dimensional honeycomb lattice.  Today, it is possible to grow and 
transfer large-area graphene sheets, which can be patterned into devices 
used for electronic, photonic, and thermoelectric applications. While 
pristine suspended graphene has remarkably high electronic and lattice 
conductivities, the influence of substrate impurities and various 
atomic-sized imperfections drastically affects the transport of charge 
and heat in realistic graphene nanostructures. However, the physics of 
“dirty” graphene is rich and exciting in its own right. In this talk, I 
will present our recent work on detailed microscopic simulation of (1) 
ac and dc electronic transport in supported graphene, with emphasis on 
short-range Coulomb interactions and impurity clustering, and (2) 
thermal transport in graphene sheets and ribbons, with focus on the 
diffusive-to-ballistic crossover, the influence of substrate and edge 
roughness, and grain boundary scattering.

References:
1.M.-H. Bae, Z. Li, Z. Aksamija, P. N. Martin, F. Xiong, Z.-Y. Ong, I. 
Knezevic, and E.  Pop,  “Ballistic to diffusive crossover of heat flow 
in graphene ribbons,”  Nature Communications 4, 1734 (2013).
2.Z. Aksamija and I. Knezevic, "Thermal transport in graphene 
nanoribbons supported on SiO2,"  Phys. Rev. B 86, 165426 (2012).
3.Z. Aksamija and I. Knezevic, “Lattice thermal conductivity of 
graphene nanoribbons: anisotropy and edge roughness scattering,” Appl. 
Phys. Lett. 98, 141919 (2011).
4.N. Sule and I. Knezevic, " Phonon-limited electron mobility in 
graphene using electronic tight-binding Bloch waves," J. Appl. Phys. 112 
, 053702 (2012).

Irena Knezevic in an Associate Professor in the Electrical and Computer 
Engineering Department of the University of Wisconsin – Madison.  Her 
research activities focus on the simulation of quantum and semiclassical 
carrier transport in electronic and optoelectronic semiconductor 
devices, heat transport at the nanoscale and nanostructured 
thermoelectrics, materials properties at THz frequencies, and developing 
efficient computational techniques for coupling the dynamics of 
electrons, phonons, and photons at the nanoscale. Dr. Knezevic is a 
recipient of the 2005 Palais’ Oustanding Doctoral Student Award, the 
2006 NSF Early Career Development (NSF CAREER) award, the 2009 AFOSR 
Young Investigator Research Program (YIP) Award, as well as the 2011 
James G. Woodburn Award for Excellence in Undergraduate Teaching.  She 
is an associate editor of the Journal of Computational Electronics.

Срдачан поздрав,
Дарко Танасковић

-- 
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/