Publication: Electron transport properties in m-plane and c-plane AlN/GaN heterostructures with interface roughness and anisotropic in-plane strain scatterings
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Issued Date
2015
Resource Type
File Type
application/pdf
ISSN
223727
Other identifier(s)
2-s2.0-84922569352
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Physics D: Applied Physics. Vol 48, No.8 (2015)
Suggested Citation
Thongnum A., Pinsook U. Electron transport properties in m-plane and c-plane AlN/GaN heterostructures with interface roughness and anisotropic in-plane strain scatterings. Journal of Physics D: Applied Physics. Vol 48, No.8 (2015). doi:10.1088/0022-3727/48/8/085301 Retrieved from: https://hdl.handle.net/20.500.14740/6159
Author(s)
Abstract
Anisotropic transport properties of a two-dimensional electron gas in nonpolar m-plane AlN/GaN heterostructures with the interface roughness coupled anisotropic in-plane strain scattering were investigated theoretically using a path-integral framework. The scattering potential was composed of the interface roughness and the effective field from the electron charge and the net piezoelectric polarization. We showed that the anisotropic biaxial strains generate only the net piezoelectric polarization along the [0 0 0 1]-direction and cause anisotropy in electron mobility with a magnitude lower than the -direction. We also showed that the anisotropy in electron mobility reduced with increasing electron density. Moreover, the anisotropic electron mobility disappeared when the anisotropic in-plane strain scattering was removed, and the relation for pure interface roughness scattering was reestablished. This formulation with existing roughness parameters gave a good description for the experimental results of polar c-plane AlN/GaN heterostructures. © 2015 IOP Publishing Ltd.
Subject(s)
Aluminum nitride
Anisotropy
Electron gas
Electron mobility
Electron transport properties
III-V semiconductors
Phase interfaces
Piezoelectric transducers
Piezoelectricity
Polarization
Strain
Transport properties
Anisotropic transport
Electron transport
In-plane strains
Interface roughness
Interface roughness scattering
Nonpolar m-plane
Piezoelectric polarizations
Scattering potentials
Two dimensional electron gas
Anisotropy
Electron gas
Electron mobility
Electron transport properties
III-V semiconductors
Phase interfaces
Piezoelectric transducers
Piezoelectricity
Polarization
Strain
Transport properties
Anisotropic transport
Electron transport
In-plane strains
Interface roughness
Interface roughness scattering
Nonpolar m-plane
Piezoelectric polarizations
Scattering potentials
Two dimensional electron gas