Strain-Induced Band Structure and Optical Conductivity Data for Kekulé-O Graphene

This repository contains Fortran 95 codes and representative numerical data supporting our study on the strain-induced electronic reconstruction and optical conductivity of Kekulé-O graphene. Using a combined numerical four-band model and analytical low-energy theory, we investigate the evolution of the electronic structure under uniaxial strain, revealing a sequence of regimes including a gapped phase, a semi-Dirac critical point, and a post-critical regime with split Dirac cones and saddle-point formation. The corresponding optical response exhibits distinct anisotropic fingerprints, including gapped absorption thresholds, semi-Dirac power-law scaling, and van Hove resonances. All data files are plain-text numerical outputs associated with band structure and optical conductivity calculations.