نوع مقاله : مقاله پژوهشی
نویسندگان
1 رئیس گروه آموزشی کارشناسی ارشد تحصیلات تکمیلی دانشگاه پدافندهوایی خاتم الانبیاء(ص)
2 گروه مهندسی برق، واحد جنوب تهران، دانشگاه آزاد اسلامی، تهران، ایران
کلیدواژهها
عنوان مقاله English
نویسنده English
Abstract
In this study, the electronic and optical properties of germanium carbide nanotubes (GeCNTs) with different chiral indices under applied strain were investigated using first-principles calculations based on density functional theory (DFT) within the PBE-GGA approximation. The results show that the (5,0) GeCNT exhibits a near-zero direct band gap with quasi-metallic behavior, whereas the (10,0) nanotube is a direct-band-gap semiconductor with a band gap of 1.29 eV. Optical analyses reveal that the main absorption and reflectivity features in out-of-plane polarization occur within the energy range of 1.5–4.0 eV, and their responses are significantly influenced by chirality and applied strain. These findings demonstrate that the tunable electronic and optical properties of GeCNTs make them promising candidates for optical sensors, nanoscale photonic devices, and infrared detection technologies.
کلیدواژهها English
