Phonons and periodons in IV–VI semiconductor superlattices |
| |
Authors: | Nabonita D Chowdhury Sankar P Sanyal |
| |
Institution: | (1) Department of Physics, Barkatullah University, 462 026 Bhopal, India |
| |
Abstract: | We have calculated the phonon and periodon dispersion relations in IV–VI semi-conducting bulk PbTe and SnTe and their superlattice
structure. The model used here is a one-dimensional lattice which includes harmonic interactions up to second neighbours as
well as on-site nonlinear electron-ion interactions at the anion site. We calculate the phonon and periodon dispersion relations
in bulk and PbTe-SnTe superlattice for the transverse optic and acoustic modes using the transfer matrix method. Our analysis
has predicted correct nature of the folding of acoustic and confinement of optical phonons at various frequency intervals
corresponding to pass and stop bands of the superlattices. |
| |
Keywords: | Phonots non-linear excitation superlattice |
本文献已被 SpringerLink 等数据库收录! |