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Title Modeling of electron mobility of gan at low temperature and low electric field
Authors Chakrabarti, Souradeep
Chatterjee, Shyamasree Gupta
Chatterjee, Somnath
ORCID
Keywords modeling of electron mobility
M-B statistics
degeneracy
low temperature
elastic scatterings
acoustic phonon piezoelectric
acoustic phonon deformation potential
ionized impurity
dislocation scattering
neutral impurity
Type Article
Date of Issue 2011
URI http://essuir.sumdu.edu.ua/handle/123456789/27918
Publisher Видавництво СумДУ
License
Citation Souradeep Chakrabarti, Shyamasree Gupta Chatterjee, Somnath Chatterjee, J. Nano- Electron. Phys. 3 No1, 1071 (2011)
Abstract An analytical model at low temperature and low field electron mobility of GaN has been developed. The electron mobility in GaN have been calculated using Relaxation Time Approximation method considering elastic process of acoustic phonon deformation potential scattering, acoustic piezoelectric scattering and ionized impurity scattering, neutral impurity scattering, dislocation scattering. Ionized impurity scattering has been treated beyond the Born approximation using Dingle and Brooks- Herring analysis. The compensation ratio is used as a parameter with a realistic charge neutrality condition. Degeneracy is very important factor as it is used to imply different statistics (Maxwell – Boltzmann or Fermi – Dirac) at different temperature. Generalized M-B statistics are used throughout because the samples we have used to compare our results are highly Non-degenarate. The result shows that, the proposed model can accurately predict the electron mobility as a function of both the carrier concentration and the temperature upto 200 K. The discrepancy of this model above temperature 200 K presumably results from the following factors: ignoring the role of optical phonon, at low temperature consideration of parabolic band i.e. neglecting the effect of inter-velly scattering and ignoring the effect of very few interfacial charges in the degenerate layer at the GaN-substrate interface. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/27918
Appears in Collections: Журнал нано- та електронної фізики (Journal of nano- and electronic physics)

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