A theoretical study of the effects of electric field, hydrostatic pressure, and temperature on photoionization cross-section of a donor impurity in (Al, Ga)N/AlN double triangular quantum wells
Walid Belaid (Selçuk University, University of Sidi Mohamed Ben Abdullah)
Haddou El Ghazi (Hassan II University of Casablanca)
Shrouk E. Zaki (National Research Center, Selçuk University)
Mohamed A. Basyooni (Selçuk University, Necmettin Erbakan University)
Mohammed Tihtih (University of Miskolc)
Redouane Ennadir (University of Sidi Mohamed Ben Abdullah)
Hamdi Şükür Kılıç (Selçuk University)
Izeddine Zorkani (University of Sidi Mohamed Ben Abdullah)
Anouar Jorio (University of Sidi Mohamed Ben Abdullah)
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Abstract
The aim of this research is to analyze the influence of various factors on the photo-ionization cross-section in (Al, Ga)N/AlN double triangular quantum wells. Using the finite difference method, the effects of the electric field, hydrostatic pressure, temperature, and Ga concentration were investigated within the effective mass and parabolic approximations. Our findings show that the photo-ionization cross-section (PICS) is highly dependent on all the variables under consideration. The optical spectra were blue-shifted with increasing electric field and pressure and red-shifted with increasing temperature and impurity displacement far from the center of the structure. Furthermore, it was found that changes in gallium content and impurity position can increase the PICS amplitude. A comparison of the obtained results with the existing literature as a limiting case of the reported problem is also provided, and excellent agreement is found.
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