| Автор | J Zi |
| Автор | W Ludwig |
| Дата выпуска | 1994-05-02 |
| dc.description | We study the phonon spectra of VI/III-V heterovalent superlattices (Si/GaAs, Si/AlAs, Ge/GaAs and Ge/AlAs) grown pseudomorphically on a (001)-oriented Ge or GaAs substrate by means of a planar force-constant model. Three possible interface configurations are considered, i.e. That the two interfaces in a period are composed of (i) two IV-III, (ii) two IV-V and (iii) IV-III and VI-V interfaces. It was found that confined modes could be well described by the bulk dispersions provided that the penetration parameter delta , which describes the penetration of a confined mode spreading into the second material, is properly chosen. In Ge/AlAs superlattices we find interface modes whose frequencies are slightly higher than that of the AlAs LO phonon at the Gamma point. Their vibrational amplitudes attenuate rapidly from the Ge-Al interface into the interior of Ge layers, but slowly into the interior of AlAs layers. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Phonons in VI/III-V heterovalent superlattices |
| Тип | paper |
| DOI | 10.1088/0953-8984/6/18/005 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 6 |
| Первая страница | 3291 |
| Последняя страница | 3300 |
| Аффилиация | J Zi; Inst. fur Theor. Phys. II, Westfalischen Wilhelms-Univ., Munster, Germany |
| Аффилиация | W Ludwig; Inst. fur Theor. Phys. II, Westfalischen Wilhelms-Univ., Munster, Germany |
| Выпуск | 18 |
