Electron Transport Mechanism in GaN/AlGaN HEMT Structures

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Turkish Journal of Physics
Volume:27 Issue:3
Electron Transport Mechanism in GaN/AlGaN HEMT Structures

Electron Transport Mechanism in GaN/AlGaN HEMT Structures

Authors : Sibel GÖKDEN

Pages : 205-210

View : 24 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The electron transport mechanism in GaN/AlGaN HEMT insert ignore into journalissuearticles values(High Electron Mobility Transistors); structures grown with MBE on sapphire substrate was investigated by using the temperature dependence of the Hall coefficient, resistivity, carrier density and Hall mobility. Hall measurements were carried out using Van der Pauw geometry. From the LO-phonon-scattering-limited component of the mobility, we obtain LO phonon energy \hbar w \approx 90 meV and the momentum relaxation time of tm \approx 4 fs. Also, from the temperature dependence of the 2D carrier density, we obtain the donor activation energy Ea \approx 29 meV.
Keywords : GaN, Momentum Relaxation, LO Phonon Scattering

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