Optical Conductivity and Electronic Structure of Monolayer Plumbene: A First-Principles Study

This study investigates the optical conductivity and electronic properties of monolayer plumbene using density functional theory (DFT) calculations. The band structure and density of states (DOS) reveal semimetallic behavior with a linear band crossing near the Fermi level. The optical conductivity spectrum exhibits distinct anisotropic peaks at ۱.۵ eV and ۳.۵ eV, while the extinction coefficient shows strong visible-range absorption. These optical features are directly correlated with interband transitions identified in the electronic structure, highlighting plumbene's potential for optoelectronic applications.