Band structure and optical response of Kekulé-modulated $\alpha -{\mathcal{T}}_3$ model

Luis E. Sánchez-González, Miguel A. Mojarro, Jeús A. Maytorena +1

We study the electronic band structure and optical response of a hybrid model, a $\alpha -{\mathcal{T}}_3$ model featuring a $\sqrt{3}\times \sqrt{3}$ Kekulé pattern modulation. Such a hybr…