27 مهر 1398
رعد چگل

رعد چگل

مرتبه علمی: دانشیار
نشانی: دانشگاه ملایر
تحصیلات: دکترای تخصصی / نانو اپتیک
تلفن: 09166615727
دانشکده: علوم پایه

مشخصات پژوهش

عنوان
Effects of an electric field on the electronic and optical properties of zigzag boron nitride nanotubes
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
A. NanostructuresA. SemiconductorsD. Electrical propertiesD. Electronic structure
سال
2011
مجله SOLID STATE COMMUNICATIONS
پژوهشگران رعد چگل

چکیده

We have investigated the electro-optical properties of zigzag BNNTs, under an external electric field, using the tight binding approximation. It is found that an electric field modifies the band structure and splits the band degeneracy. Also the large electric strength leads to coupling the neighbor subbands which these effects reflect in the DOS and JDOS spectrum. It has been shown that, unlike CNTs, the band gap of BNNTs can be reduced linearly by applying a transverse external electric field. Also we show that the larger diameter tubes are more sensitive than small ones. The semiconducting metallic transition can be achieved through increasing the applied fields. The number and position of peaks in the JDOS spectrum are dependent on electric field strength. It is found that at a high electric field, the two lowest subbands are oscillatory with multiple nodes at the Fermi level.