Optical phonon modes confinement in quasiperiodic semiconductor superlattice
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Acknowledgements
We would like to thank the Brazilian Agencies FAPERN, MCT-CTInfra, CNPq-NanoSemiMat and CAPES-Procad for partial financial support.
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Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: Transfer-matrix method
2011, Physica E: Low-Dimensional Systems and NanostructuresCitation Excerpt :This is mainly ascribed to the following evident facts: the nitride materials possessing wide and adjustable direct-bandgap, strong atomic bonding and high carrier mobility, which make them attractive materials as a basis for the creation of reliable high-temperature and high-frequency electronic equipments and short-wavelength optoelectronics devices [5–7]. On the basis of the dielectric continuum (DC) approximation and Loudon's uniaxial crystal model [30], several authors have made great contributions in studying the polar optical phonons and their electron–phonon interactions in wurtzite nitride binary SLs [18,31,32]. For example, Gleize and his coworkers [31] investigated anisotropy effects on polar phonon modes in wurtzite GaN/AlN SLs, and the quasi-confined (QC) phonon modes and interface-optical (IO) phonon modes were found in the SL structures.
Polar propagating optical phonon states and their dispersive spectra in wurtzite nitride superlattices: Quantum size effect
2010, Superlattices and MicrostructuresCitation Excerpt :Hence the understanding of lattice dynamics and electron–phonon interactions in wurtzite quantum heterostructures has not only important theoretical meaning, but also practical significance for device applications. In fact, on the basis of the dielectric continuum approximation and Loudon’s uniaxial crystal model [11], several authors have made great contributions in studying the polar optical phonons and their electron–phonon interactions in wurtzite nitride SL systems [12–21]. On the side of theoretical researches, Gleize and his coworkers [12] investigated anisotropy effects on polar phonon modes in wurtzite GaN/AlN SLs, and the quasi-confined (QC) phonon modes and interface-optical (IO) phonon modes were found in the SL structures.
Full optical phonon states and their dispersive spectra of a wurtzite GaN/AlGaN superlattice: Quantum size effect
2011, Physica Status Solidi (B) Basic Research