Polaronic Effect on the Electron Energy Spectrum in a Wurtzite InxGa1-xN/GaN Quantum Well
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概要
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The properties of polarons in wurtzite and zinc-blende InxGa1-xN/GaN quantum wells are investigated by adopting an effective-mass approximation and a modified Lee--Low--Pines variational method. The energy shifts of polarons at ground state due to the confined, half-space and interface phonon modes (including symmetric and antisymmetric parts), as well as the ground state energy and transition energy, are obtained by a numerical computation. The results indicate that both ground state energy and transition energy of polarons decrease monotonically with increasing the well width. For a wider quantum well, the total contribution to the polaron energy mainly comes from the confined phonon modes, while for a narrower one, the total contribution is mainly from the interface and half-space phonon modes. The built-in electric field has a remarkable effect on the polaron energy shifts contributed by various phonon modes. It can be also found that the polaronic effect in InxGa1-xN/GaN quantum wells is much stronger than that in conventional zinc-blende quantum wells composed by arsenide compounds.
- 2011-09-15
著者
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Zhang Min
College Of Chemistry Chemical Engineering And Materials Science Shandong Normal University
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Zhang Min
College of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Hohhot 010022, P. R. China
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Zhao Feng
College of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Hohhot 010022, P. R. China
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