ELECTRON–PHONON INTERACTION IN WURTZITE AlxGa1-xN TERNARY CRYSTAL

Optical vibrations of the lattice and the electron-optical-phonon interaction in wurtzite ternary nitride-based crystals was studied using the pseudo-unit-cell approach. The Frohlich coupling constants, polaron energy shifts and the effective masses of the polaron in the system were investigated using the perturbation method. It was found that the LO and TO phonons in wurtzite AlxGa1-xN exhibit the one-mode behavior. The effects of the unit-cell volume varying with the composition x of ternary nitride-based crystals were also investigated.

[1]  E. Haller,et al.  Fermi-level stabilization energy in group III nitrides , 2005 .

[2]  Jun-jie Shi.  Interface optical-phonon modes and electron–interface-phonon interactions in wurtzite GaN/AlN quantum wells , 2003 .

[3]  M. Schubert,et al.  Optical phonon modes and interband transitions in cubic Al x Ga 1 − x N films , 2002 .

[4]  A. N. Smirnov,et al.  Composition dependence of optical phonon energies and Raman line broadening in hexagonal Al x Ga 1 − x N alloys , 2002 .

[5]  R. Abram,et al.  Direct calculation of k.p parameters for wurtzite AlN, GaN and InN. , 2000 .

[6]  Friedhelm Bechstedt,et al.  Phonons in ternary group-III nitride alloys , 2000 .

[7]  R. Zheng,et al.  Electron-phonon interaction in mixed crystals , 1999 .

[8]  S. M. Komirenko,et al.  Dispersion of polar optical phonons in wurtzite quantum wells , 1999 .

[9]  Mitra Dutta,et al.  Long-wavelength optical phonons in ternary nitride-based crystals , 1998 .

[10]  M. Stroscio,et al.  Optical-phonon confinement and scattering in wurtzite heterostructures , 1998 .

[11]  J. Groenen,et al.  Coupling of GaN- and AlN-like longitudinal optic phonons in Ga1−xAlxN solid solutions , 1998 .

[12]  L. Romano,et al.  Phase Separation in InGaN/GaN Multiple Quantum Wells , 1998 .

[13]  S. Noda,et al.  Compositional inhomogeneity and immiscibility of a GaInN ternary alloy , 1997 .

[14]  Theodore D. Moustakas,et al.  Phase separation in InGaN thick films and formation of InGaN/GaN double heterostructures in the entire alloy composition , 1997 .

[15]  K. Bachem,et al.  Resonant Raman scattering in GaN/(AlGa)N single quantum wells , 1997 .

[16]  X. Liang,et al.  Effective-phonon approximation of polarons in ternary mixed crystals , 1996 .

[17]  D. W. Taylor.  Phonon Response Theory and the Infrared and Raman experiments , 1988 .

[18]  S. Adachi.  GaAs, AlAs, and AlxGa1−xAs: Material parameters for use in research and device applications , 1985 .

[19]  James F. Scott,et al.  Scattering of Light by Crystals , 1998 .

[20]  L. Genzel,et al.  Model for Long ‐ Wavelength Optical‐Phonon Modes of Mixed Crystals , 1974 .

[21]  I. F. Chang,et al.  Long wavelength optical phonons in mixed crystals , 1971 .