Quantum-statistical theory for laser-tuned transport and optical conductivities of dressed electrons in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi mathvariant="script">T</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> materials
Andrii Iurov, Liubov Zhemchuzhna, Dipendra Dahal, Godfrey Gumbs, Danhong Huang
Abstract
In the presence of external off-resonance and circularly polarized irradiation, we have derived a many-body formalism and performed a detailed numerical analysis for both the conduction and the optical currents in $\ensuremath{\alpha}\ensuremath{-}{\mathcal{T}}_{3}$ lattices. The calculated complex many-body dielectric function as well as conductivities of displacement and transport currents display strong dependence on the lattice-structure parameter $\ensuremath{\alpha}$, especially approaching the graphene limit with $\ensuremath{\alpha}\ensuremath{\rightarrow}0$. Unique features in dispersion and damping of plasmon modes are observed with different $\ensuremath{\alpha}$ values, which are further accompanied by a reduced transport conductivity under irradiation. The discovery in this paper can be used for designing novel multifunctional nanoelectronic and nanoplasmonic devices.