77th Annual Meeting of the Southeastern Section of the APS
Volume 55, Number 10
Wednesday–Saturday, October 20–23, 2010;
Baton Rouge, Louisiana
Session GB: Carbon Nanotubes: From Synthesis and Characterization to Functionalization and Devices
10:45 AM–12:45 PM,
Friday, October 22, 2010
Nicholson Hall
Room: 109
Chair: Mark Jack, Florida A&M University
Abstract ID: BAPS.2010.SES.GB.4
Abstract: GB.00004 : Quantum transport in carbon nanorings for metamaterials applications*
12:15 PM–12:45 PM
Preview Abstract
Abstract
Author:
Mark Jack
(Florida A\&M University, Physics Department)
Central theme of this theoretical study is quantum transport on
carbon nanoring surfaces under microwave illumination and the
transmission of electromagnetic energy across a two-dimensional
array of properly aligned toroidal carbon nanotubes for
metamaterials applications. In a classical description,
electromagnetically driven electronic surface currents in the
rings will themselves generate in multipole radiation to
interfere with an incoming polarized wave front, which may lead
to new optical response characteristics created e.g. by the
chiral features of the underlying mesoscopic structures. Possible
applications ranging from quantum computing to new energy
harvesting technologies could be envisioned. At these mesoscopic
scales however a proper quantum mechanical treatment of these
coherent electronic oscillations in form of \textit{surface
plasmon-polaritons (SPPs)} that travel along the toroidal
surfaces is necessary. The main effects of SPPs in charge
transport can be described in a simplified Hubbard model that
allows a generalization of single-electron tightbinding transport
calculations in a non-equilibrium Green's function
formalism. An existing Fortran code is being expanded to include
these quantum many-body effects by calculating the transport
Green's function G$_{F}$ using highly optimized, parallel matrix
inversion routines in an object-oriented C++ code with the
ScaLAPACK library on NSF \textit{TeraGrid} resources (TACC).
Multiparticle quantum effects can thus be treated accurately and
quickly for realistic nanoring device sizes of few 10,000 carbon
atoms or more. The influence of different torus dimensions and
relative alignments may be studied on how electromagnetic energy
is stored and transmitted across the metamaterial. Additionally,
in a collaboration with the Georgia Institute of Technology the
influence of electron-phonon coupling on transport for low-energy
vibrational modes is investigated, crucial for
understanding true nanodevice performance when including
dissipation. This project was partially supported as a summer
research project under the 2010 NCSI/Shodor Petascale Computing
Undergraduate Summer Internship and the 2010 NSF TeraGrid
\textit{Pathways} Summer Faculty Fellowship Program.
*2010 NSF TeraGrid Pathways Summer Faculty Fellowship Program
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.SES.GB.4