Spectrum and normalized modes of acoustic phonons in multilayer nitride-based nanostructure

• Published in: The European physical journal. B, Condensed matter physics Vol. 93; no. 3
• Main Authors: Boyko, Igor, Petryk, Mykhaylo, Fraissard, Jacques
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-03-2020; Springer; Springer Nature B.V
• Subjects: Acoustics; Analysis; Complex Systems; Condensed Matter Physics; Elastic analysis; Electron transport; Equations of motion; Exact solutions; Fluid- and Aerodynamics; Gallium nitrides; Multilayers; Nanostructure; Nitrides; Phonons; Physics; Physics and Astronomy; Quantum wells; Regular Article; Solid State Physics; Solid State and Materials
• ISSN: 1434-6028; 1434-6036
• DOI: 10.1140/epjb/e2020-100597-x

Using the model of an elastic continuum, precise analytical solutions of the equations of motion are established and a theory of the spectrum and components of the displacement field of acoustic phonons is developed for a two-well resonant-tunneling nanostructure with AlN – quantum barriers and GaN∕Al
x
Ga
1−x
N – quantum wells. For the experimentally realised nanostructure – the active zone of a quantum cascade detector – depending on its geometric parameters, the spectrum of acoustic phonons and normalized components of the displacement fields were calculated.
Graphical abstract