Exploring the Optical Characteristics of C₃B/C₃N van der Waals Heterostructures: Effects of Magnetic Fields and Mechanical Strain

Carbon-based bilayer van der Waals (vdW) materials are garnering significant interest due to their intriguing physical properties. In this study, we theoretically investigate the electronic and optical characteristics of the C₃B/C₃N vdW heterostructure under external magnetic field and mechanical strain. We construct a tight-binding model that accounts for strain-induced modifications in hopping interactions, incorporating the effects of a uniform perpendicular magnetic field using the Peierls substitution method. Our findings reveal notable electronic and optical responses to mechanical strain, including band inversion, changes in band gap and optical gap, distortion of band-edge states, and a substantial enhancement in optical absorption. Additionally, the interplay between the external magnetic field and biaxial strain produces unique features in quantization and optical spectra. This work contributes valuable insights into the engineering of materials influenced by external effects. Our results suggest that the C₃B/C₃N vdW heterostructure is a promising candidate for next-generation electronic and optoelectronic applications.