Two-dimensional lattice sums and the dispersion relation of Frenkel excitons
Abstract
Certain dipolar lattice sums, previously carried out in three dimensions, are worked out here for the two-dimensional square lattice. As an application of the results, the dispersion relations of the singlet-type Frenkel excitons for the system are determined.
- Publication:
-
Physical Review B
- Pub Date:
- September 1980
- DOI:
- 10.1103/PhysRevB.22.2645
- Bibcode:
- 1980PhRvB..22.2645L