Adjustment of optical absorption in phosphorene through electron–phonon coupling and an electric field

Chúng tôi vui mừng thông báo rằng GS. Trần Công Phong và các đồng nghiệp gần đây đã xuất bản công trình của họ có tựa đề "Adjustment of optical absorption in phosphorene through electron–phonon coupling and an electric field" trên tạp chí Physical Chemistry Chemical Physics

Tóm tắt:

This study investigates the optical absorption of monolayer phosphorene, focusing on its response to the electron–phonon coupling (EPC) and an electric field. Using a tight-binding Hamiltonian model based on the Barišic–Labbe–Friedel–Su–Schrieffer–Heeger model and the Kubo formula, we calculate the electronic band structure and optical absorption characteristics. The anisotropic dispersion of carriers along armchair and zigzag directions leads to distinct optical responses. Positive and negative EPC effects increase and decrease hopping parameters, respectively, enlarging and reducing/closing the band gap. Moreover, both EPCs cause an admixture of blue and red shift spectrum along the armchair direction, while a red (blue) shift spectrum is observed for positive (negative) EPC along the zigzag direction. Incorporating electric field effects in the EPC increases band gaps for both positive and negative EPC activities, resulting in shifted optical peaks along both directions.