Work

Electric-field-induced enhancement of exciton binding energy in one-dimensional phosphorene atomic chain

Year: 2024

Type: article

Abstract: An electric field normally increases the separation between the electron and hole in an exciton without intrinsic polarization and suppresses their Coulombic interaction, resulting in the reduction of its binding energy. Our study of one-dimensional (1D) excitons in phosphorene atomic chains, by using the exact diagonalization method, however, reveals that an electric field applied along the chain axis actually increases the exciton binding energies. Further analysis shows that the electric field tends to enhance the long-range interaction between the electron and hole while suppressing their short-range interaction by inducing an alternating charge distribution along the atomic chain. The zigzag symmetry is believed to account for this unique excitonic phenomenon in the 1D system.

Source: Journal of Applied Physics

DOI: 10.1063/5.0226011

Authors: Wenzhuo Huang, Jun Zhong, Weidong Sheng

Institutions: Fudan University, State Key Laboratory of Surface Physics

Language: English

Topic: 2D Materials and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funder: National Natural Science Foundation of China