| Автор | Jing-Lin Xiao |
| Дата выпуска | 1992-07-06 |
| dc.description | In this paper, some properties of a surface exciton in polyatomic polar crystals are studied. Effective Hamiltonians in the ground state of the surface exciton for both strong-coupling and weak-coupling-polyatomic polar crystals are obtained by the method of a linear combination operator and simple unitary transformation. The effective mass of a strong-coupling surface exciton is derived using a Lagrange multiplier method. The self-trapping energy and effective potential of the surface exciton could be written as a series in alpha <sub>s</sub><sup>-1</sup>, the first term being proportional to alpha <sub>s</sub>, the coupling constant. The self-trapping energy and effective potential contain an extra contribution due to crossed terms between the different phonon branches. For a surface Wannier exciton the increasing part of the effective mass is proportional to alpha <sub>s</sub>. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Surface exciton in polyatomic polar crystals |
| Тип | paper |
| DOI | 10.1088/0953-8984/4/27/005 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 4 |
| Первая страница | 5863 |
| Последняя страница | 5872 |
| Аффилиация | Jing-Lin Xiao; Dept. of Phys., NeiMongol Nat. Teacher's Coll., Tongliao, China |
| Выпуск | 27 |
