Research output: Contribution to journal › Article › peer-review
Vibrational spectra of AlN/GaN superlattices : Theory and experiment. / Smirnov, M. B.; Karpov, S. V.; Davydov, V. Yu; Smirnov, A. N.; Zavarin, E. E.; Lundin, V. V.
In: Physics of the Solid State, Vol. 47, No. 4, 2005, p. 742-753.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Vibrational spectra of AlN/GaN superlattices
T2 - Theory and experiment
AU - Smirnov, M. B.
AU - Karpov, S. V.
AU - Davydov, V. Yu
AU - Smirnov, A. N.
AU - Zavarin, E. E.
AU - Lundin, V. V.
N1 - Funding Information: This study was supported by the Russian Foundation for Basic Research (project no. 03-02-17562) and the programs of the Presidium of the RAS “Low-Dimensional Structures” and “New Structures and Materials.” Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - Computer simulation of the dynamics of layered AlN/GaN superlattices is performed to elucidate the microscopic nature of the vibrational states corresponding to the strongest bands in the Raman spectra. Experimental Raman spectra are shown to consist of two groups of lines, one of which exhibits a two-mode behavior and the other shows a one-mode behavior as the relative layer thicknesses are varied. The results of computer simulation and calculations within the dielectric-continuum approximation suggest that the behavior of the observed vibrational modes is dictated by the degree of their localization and that the interlayer coupling is due to long-range dipole-dipole interactions. It is shown that the delocalized modes, which exhibit one-mode behavior, can be used as a sensitive probe of the structure and composition of superlattices.
AB - Computer simulation of the dynamics of layered AlN/GaN superlattices is performed to elucidate the microscopic nature of the vibrational states corresponding to the strongest bands in the Raman spectra. Experimental Raman spectra are shown to consist of two groups of lines, one of which exhibits a two-mode behavior and the other shows a one-mode behavior as the relative layer thicknesses are varied. The results of computer simulation and calculations within the dielectric-continuum approximation suggest that the behavior of the observed vibrational modes is dictated by the degree of their localization and that the interlayer coupling is due to long-range dipole-dipole interactions. It is shown that the delocalized modes, which exhibit one-mode behavior, can be used as a sensitive probe of the structure and composition of superlattices.
UR - http://www.scopus.com/inward/record.url?scp=21944441275&partnerID=8YFLogxK
U2 - 10.1134/1.1913991
DO - 10.1134/1.1913991
M3 - Article
AN - SCOPUS:21944441275
VL - 47
SP - 742
EP - 753
JO - Physics of the Solid State
JF - Physics of the Solid State
SN - 1063-7834
IS - 4
ER -
ID: 73028207