Polarization operator of phonons in quadratic approximation

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2000
• ISSN: 1560-8034
• Main Author: Grigorchuk, N.I.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2000
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/121153
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Polarization operator of phonons in quadratic approximation / N.I. Grigorchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2000. — Т. 3, № 3. — С. 316-321. — Бібліогр.: 22 назв. — англ.

Using the method of the retarded Green function the polarization operator of phonons has been calculated with the simultaneous account for the linear and quadratic terms in the Hamilton operator of exciton-phonon interaction. It is shown that at high temperatures and concentrations of excitons the q...