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Acoustic phonon transmission spectra in piezoelectric AlN/GaN Fibonacci phononic crystals

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  • P. D. Sesion
  • E. L. Albuquerque

    ()

  • C. Chesman
  • V. N. Freire
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    Abstract

    We study the acoustic-phonon transmission spectra in periodic and quasiperiodic (Fibonacci type) superlattices made up from the III-V nitride materials AlN and GaN. The phonon dynamics is described by a coupled elastic and electromagnetic equations within the static field approximation model, stressing the importance of the piezoelectric polarization field in a strained condition. We use a transfer-matrix treatment to simplify the algebra, which would be otherwise quite complicated, allowing a neat analytical expressions for the phonon transmission coefficients. Numerical results, for the normal incidence case, show a strike self-similar pattern for both hexagonal (class 6 mm) and cubic symmetries crystalizations of the nitrides. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

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    File URL: http://hdl.handle.net/10.1140/epjb/e2007-00249-5
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    Bibliographic Info

    Article provided by Springer in its journal The European Physical Journal B.

    Volume (Year): 58 (2007)
    Issue (Month): 4 (08)
    Pages: 379-387

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    Handle: RePEc:spr:eurphb:v:58:y:2007:i:4:p:379-387

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    Web page: http://www.springer.com/economics/journal/10051

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    Related research

    Keywords: 63.20.Dj Phonon states and bands; normal modes; and phonon dispersion; 63.22.+m Phonons or vibrational states in low-dimensional structures and nanoscale materials; 77.65.-j Piezoelectricity and electromechanical effects;

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