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Direction-dependent giant optical conductivity in two-dimensional semi-Dirac materials

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We show that the gap parameter in semi-Dirac material induces a large degree of sensitivity for interband optical conductivity with respect to the polarization direction. The optical conductivity reveals an… Click to show full abstract

We show that the gap parameter in semi-Dirac material induces a large degree of sensitivity for interband 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 two-dimensional semi-Dirac materials, in addition to other possible applications in the field of transparent conductors.

Keywords: direction; semi dirac; direction dependent; optical conductivity

Journal Title: Physical Review B
Year Published: 2019

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