Vibrational spectra of AlN/GaN superlattices: Theory and experiment

被引：0
作者：
M. B. Smirnov
S. V. Karpov
V. Yu. Davydov
A. N. Smirnov
E. E. Zavarin
V. V. Lundin
机构：
[1] St. Petersburg State University,Fock Institute of Physics
[2] Russian Academy of Sciences,Ioffe Physicotechnical Institute
来源：
Physics of the Solid State | 2005年 / 47卷
关键词：
Spectroscopy; State Physics; Layer Thickness; Computer Simulation; Raman Spectrum;
D O I：
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中图分类号：
学科分类号：
摘要：
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.
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页码：742 / 753
页数：11
相关论文
共 98 条
  • [1] Jusserand B.(1987)undefined Phys. Rev. B 35 2808-undefined
  • [2] Paquet D.(1986)undefined Phys. Rev. B 33 5928-undefined
  • [3] Mollot F.(1999)undefined Appl. Phys. Lett. 74 703-undefined
  • [4] Alexandre F.(2001)undefined Phys. Status Solidi A 188 863-undefined
  • [5] Le Roux G.(2002)undefined Phys. Status Solidi B 234 975-undefined
  • [6] Brugger H.(1997)undefined J. Appl. Phys. 82 622-undefined
  • [7] Abstreiter G.(1999)undefined Phys. Rev. B 60 15985-undefined
  • [8] Jorke H.(1985)undefined Phys. Rev. B 31 2080-undefined
  • [9] Herzog H. J.(1955)undefined Zh. Éksp. Teor. Fiz. 29 605-undefined
  • [10] Kasper E.(2001)undefined Mater. Sci. Eng. B 82 27-undefined
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