POLAR INTERFACE-OPTICAL VIBRATIONAL SPECTRA IN A WURTZITEGaN/AlNRECTANGULAR QUANTUM WIRE

L. Zhang ()
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L. Zhang: Department of Mechanism and Electron, Panyu Polytechnic, Panyu, 511483, P. R. China

Surface Review and Letters (SRL), 2006, vol. 13, issue 01, 75-80

Abstract: Under the dielectric continuum model and Loudon's uniaxial crystal model, the interface optical (IO) phonon modes in a quasi-one-dimensional (Q1D) wurtzite rectangular quantum wire are deduced and analyzed. Numerical calculation on a wurtziteGaN/AlNrectangular wurtzite quantum wire was performed. Results reveal that the dispersion frequencies of IO modes sensitively depend on the geometric structures of the Q1D wurtzite rectangular quantum wires. The degenerating behavior of the IO phonon modes in the Q1D wurtzite rectangular quantum wire has been clearly observed for small free wave numberkzinz-direction. The limited frequency behaviors of IO modes have been analyzed deeply, and detailed comparisons with those in wurtzite planar quantum wells and cylindrical quantum wires are also done. Moreover, once the anisotropy of the wurtzite material has been ignored, the present theories can be naturally reduced to the situation of Q1D cubic rectangular quantum wire systems.

Keywords: Interface modes; wurtzite heterostructure; rectangular quantum wires; 78.67.Lt; 74.25.Kc; 63.20.Kr; 81.05.Ea (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X0600786X

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