Jump to main content
Jump to site search

Issue 32, 2017
Previous Article Next Article

Optical properties and magnetic flux-induced electronic band tuning of a T-graphene sheet and nanoribbon

Author affiliations

Abstract

Tetragonal graphene (T-graphene) is a theoretically proposed dynamically stable, metallic allotrope of graphene. In this theoretical investigation, a tight binding (TB) model is used to unravel the metal to semiconductor transition of this 2D sheet under the influence of an external magnetic flux. In addition, the environment under which the sheet exposes an appreciable direct band gap of 1.41 ± 0.01 eV is examined. Similarly, the electronic band structure of the narrowest armchair T-graphene nanoribbon (NATGNR) also gets modified with different combinations of magnetic fluxes through the elementary rings. The band tuning parameters are critically identified for both systems. It is observed that the induced band gaps vary remarkably with the tuning parameters. We have also introduced an exact analytical approach to address the band structure of the NATGNR in the absence of any magnetic flux. Finally, the optical properties of the sheet and NATGNR are also critically analysed for both parallel and perpendicular polarizations with the help of density functional theory (DFT). Our study predicts that this material and its nanoribbons can be used in optoelectronic devices.

Graphical abstract: Optical properties and magnetic flux-induced electronic band tuning of a T-graphene sheet and nanoribbon

Back to tab navigation

Article information


Submitted
14 Jun 2017
Accepted
24 Jul 2017
First published
24 Jul 2017

Phys. Chem. Chem. Phys., 2017,19, 21584-21594
Article type
Paper

Optical properties and magnetic flux-induced electronic band tuning of a T-graphene sheet and nanoribbon

A. Bandyopadhyay, A. Nandy, A. Chakrabarti and D. Jana, Phys. Chem. Chem. Phys., 2017, 19, 21584
DOI: 10.1039/C7CP03983B

Social activity

Search articles by author

Spotlight

Advertisements