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2012 | 10 | 2 | 485-491
Tytuł artykułu

Determination of the LO phonon energy by using electronic and optical methods in AlGaN/GaN

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The longitudinal optical (LO) phonon energy in AlGaN/GaN heterostructures is determined from temperature-dependent Hall effect measurements and also from Infrared (IR) spectroscopy and Raman spectroscopy. The Hall effect measurements on AlGaN/GaN heterostructures grown by MOCVD have been carried out as a function of temperature in the range 1.8-275 K at a fixed magnetic field. The IR and Raman spectroscopy measurements have been carried out at room temperature. The experimental data for the temperature dependence of the Hall mobility were compared with the calculated electron mobility. In the calculations of electron mobility, polar optical phonon scattering, ionized impurity scattering, background impurity scattering, interface roughness, piezoelectric scattering, acoustic phonon scattering and dislocation scattering were taken into account at all temperatures. The result is that at low temperatures interface roughness scattering is the dominant scattering mechanism and at high temperatures polar optical phonon scattering is dominant.
Wydawca
Czasopismo
Rocznik
Tom
10
Numer
2
Strony
485-491
Opis fizyczny
Daty
wydano
2012-04-01
online
2012-03-31
Twórcy
autor
  • Department of Physics, Faculty of Science, Anadolu University, Yunus Emre Campus, 26470, Eskisehir, Turkey , ozlem.c@anadolu.edu.tr
autor
  • Department of Physics, Faculty of Science, Anadolu University, Yunus Emre Campus, 26470, Eskisehir, Turkey
autor
  • Department of Physics, Faculty of Science, Anadolu University, Yunus Emre Campus, 26470, Eskisehir, Turkey
  • Department of Physics, Faculty of Science and Arts, Gazi University, Teknikokullar, 06500, Ankara, Turkey
autor
  • Nanotechnology Research Center, Department of Physics, and Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-011-0100-x
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