Electronic and Optical Properties of Rare Earth Atoms Doped Niobium Dichalcogenides NbX₂ (X=S, Se) Monolayers: A First Principle Study. LJSIR [انترنت]. 7 يوليو، 2025 [وثق 17 مايو، 2026];3(2):71-8. موجود في: https://lafiascijournals.org.ng/index.php/ljsir/article/view/548