Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Condensed Matter Physics and Material Science

Abstract ID: ANPA2023-N00054

Abstract:

ANPA2023-N00054: Energy dispersion of self-assembled single walled carbon nanotube arrays

Authors:

• Da'Shawn M. Morris ; Department of Chemistry, Physics and Materials Science, Fayetteville State University, Fayetteville, North Carolina 28301, United States

• Da'Shawn M. Morris; Department of Chemistry, Physics and Materials Science, Fayetteville State University, Fayetteville, North Carolina 28301, United States

• Chandra M. Adhikari;

• Bhoj R. Gautam;

Carbon nanotubes (CNTs) are cylindrical carbon structures with diameters of as low as a few nanometers. A CNT can be perceived as a rolled-up graphene sheet of one-atom-thick layer of carbon atoms arranged in a hexagonal lattice. CNTs are known for their exceptional mechanical, optical, and electrical properties, which make them ideal for a wide range of opto-electronic applications. We theoretically investigate the dynamical conductivity and dielectric responses of single-walled CNTs (SWCNTs) of different chirality using the k.p method of the band structure theory in addition to the low-energy plasmonic response calculation technique and the many-particle Green’s function formalism. We model a thin film of SWCNTs as periodically aligned cylinders of the same length, radius and chirality immersed in a dielectric medium of constant permittivity. We find that the conductivities and the dielectric responses of a SWCNT are chirality dependent. We also investigate the energy dispersion of SWCNT films and estimate their excitonic energy gaps. For a film of homogeneous periodically aligned (11,0) SWCNT, the excitonic energy gap is about 2.32 eV. This work is supported by the National Science Foundation RIA 1900998. References: 1. C. M. Adhikari, I. V. Bondarev, J. Appl. Phys. 129, 015301 (2021). 2. I. V. Bondarev, C. M. Adhikari Phys. Rev. Applied 15, 034001 (2021). 3. G. D. Mahan, Many particle physics (Kluwer Academic, New York, 2000), 3rd ed. Correspondence: cadhikari@uncfsu.edu

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N00054