Direction dependent giant optical conductivity in 2D \textit{semi}-Dirac materials

TL;DR

This study demonstrates that the optical conductivity in 2D semi-Dirac materials is highly sensitive to polarization direction, showing large anisotropic responses that can reveal dispersive properties and enable applications in transparent conductors.

Contribution

It introduces the concept of direction-dependent giant optical conductivity in 2D semi-Dirac materials driven by the gap parameter, highlighting its potential for material characterization and applications.

Findings

Optical conductivity varies sharply with polarization direction.

Large optical response occurs at specific frequencies along certain directions.

Anisotropic optical behavior can predict dispersive properties of the material.

Abstract

We show that the gap parameter in \textit{semi}-Dirac material induces a large degree of sensitivity for inter-band optical conductivity with respect to the polarization direction. The optical conductivity reveals an abruptly large value at a certain frequency for light along a particular polarization direction while it is significantly suppressed along the direction orthogonal to the former. The direction-dependent optical conductivity may, in turn, be used to uniquely predict the dispersive nature of the 2D \textit{semi}-Dirac materials, in addition to other possible applications in the field of transparent conductors.