Effect of strain on vibrational modes in strained layer superlattices |
| |
Authors: | Sujata Rath Sankar P Sanyal |
| |
Institution: | (1) Department of Physics, Barkatullah University, C V Raman Building, 462 026 Bhopal, India |
| |
Abstract: | We have investigated the lattice vibrational properties of a two-component strained layer semiconductor superlattice (GaAs)
n1 (GaSb)
n2 using a one-dimensional linear chain model and transfer matrix method 1]. Effect of strain, arising due to the lattice mismatch
(∼ 7%) has been considered explicitly in the equation of motion. We show for the first time that the optical vibrational frequency
increases (in the case of (GaAs)4 (GaSb)
n
) or decreases (in the case of (GaAs)
n
(GaSb)4) with increase of layer thicknessn, in either type of superlattices. Raman scattering measurements on some other similar systems support our findings. |
| |
Keywords: | Vibrational modes strained layer superlattices linear chain model transfer matrix |
本文献已被 SpringerLink 等数据库收录! |