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تأثیر میدان مغناطیسی خارجی بر ایجاد تبهگنی ترازهای انرژی در پاد نقطه کوانتومی | ||
فصلنامه علمی اپتوالکترونیک | ||
دوره 3، شماره 1 - شماره پیاپی 8، اسفند 1399، صفحه 81-88 اصل مقاله (413.13 K) | ||
نوع مقاله: پژوهشی | ||
شناسه دیجیتال (DOI): 10.30473/jphys.2021.62213.1105 | ||
نویسندگان | ||
مجید ابراهیم زاده1؛ مهناز غفاری* 2؛ لادن غفاری3 | ||
1دکتری فیزیک، دانشگاه شیراز، شیراز، ایران | ||
2کارشناسی ارشد فیزیک، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران | ||
3کارشناسی فیزیک، دانشگاه فردوسی مشهد، مشهد، ایران | ||
چکیده | ||
در این مقاله تأثیر میدان مغناطیسی بر ترازهای انرژی در پاد نقطه کوانتومی بررسی میشود. بدین منظور ابتدا بر اساس نظریه اختلال و در حضور میدان مغناطیسی خارجی، ویژه مقادیر انرژی این نانو ساختار به دست آورده میشود. سپس بر اساس پیشبینیهای تئوریو همچنین با محاسبات عددی نشان داده خواهد شد که میدان مغناطیسی همیشه باعث از بین رفتن تبهگنی ترازهای انرژی نمیشود و تحت شرایطی خاص، میدان مغناطیسی خود سبب بهوجود آمدن تبهگنی جدید در ترازهای انرژی میشود. در ادامه نشان خواهیم داد تغییرات انرژی بر حسب ارتفاع سد پتانسیل باعث حذف کامل تبهگنیهای ایجاد شده بعد از اعمال میدان مغناطیسی خواهد شد. | ||
کلیدواژهها | ||
پادنقطه کوانتومی؛ میدان مغناطیسی؛ نظریه اختلال؛ سد پتانسیل | ||
عنوان مقاله [English] | ||
The Effect of External Magnetic Field on the Creation of Energy Levels Degeneracy in a Quantum Anti-Dot | ||
نویسندگان [English] | ||
Majid Ebrahimzadeh1؛ Mahnaz Ghaffari2؛ Ladan Ghaffari3 | ||
1Ph.D. of Physics, Shiraz University, Shiraz, Iran | ||
2M.A. of Physics, Shiraz Branch, Islamic Azad University, Shiraz, Iran | ||
3B.A of Physics, Ferdowsi University of Mashhad, Mashhad, Iran | ||
چکیده [English] | ||
In this paper, the effect of a magnetic field on 2p energy levels of 〖Ga〗_(1-x) 〖Al〗_x As/GaAs/〖Ga〗_(1-x) 〖Al〗_x As quantum anti-dot has been investigated. To this aim, based on the perturbation theory and in the presence of an external magnetic field, the energy eigenvalue of the 2p state of this nano-structure is obtained. Then, on the basis of theoretical predictions and numerical calculations, it will be shown that the magnetic field does not always eliminate the degeneracies of energy levels and under certain conditions, the magnetic field itself is the cause of a new degeneracy in the energy levels. Furthermore, it is proved that changes in the height of the potential barrier will remove the degeneracy created after the application of the magnetic field. | ||
کلیدواژهها [English] | ||
Quantum Antidote, Magnetic Field, Perturbation Theo-ry, Potential Barrier | ||
مراجع | ||
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