Ref HAL: hal-02302374_v1
DOI: 10.1002/andp.201800486
WoS: WOS:000471714300003
Exporter : BibTex | endNote
Résumé:

The screened Coulomb potential plays a crucial role in the binding energies of excitons in a thin dielectric slab. The asymptotic behavior of this potential is studied when the thickness of the slab is very small as compared to the exciton Bohr radius. A regularized expression is given and the exact effective 2D potential is derived. These expressions may be useful for the computation of the exciton binding energy in 2D or quasi‐2D materials.