کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8206134 1530598 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of the thermoelectric figure of merit in a quantum dot due to external ac field
ترجمه فارسی عنوان
افزایش ضریب ترموالکتریک شایستگی در نقطه کوانتومی به علت میدان خارجی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
چکیده انگلیسی
We investigate the figure of merit of a quantum dot (QD) system irradiated with an external microwave filed by nonequilibrium Greenʼs function (NGF) technique. Results show that the frequency of microwave field influence the figure of merit ZT significantly. At low temperature, a sharp peak can be observed in the figure of merit ZT as the frequency of ac field increases. As the frequency varies, several zero points and resonant peaks emerge in the figure of merit ZT. By adjusting the frequency of the microwave field, we can obtain high ZT. The figure of merit ZT increases with the decreasing of linewidth function Γ. In addition, Wiedemann-Franz law does not hold, particularly in the low frequency region due to multi-photon emission and absorption. Some novel thermoelectric properties are also found in two-level QD system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 377, Issues 19–20, 15 August 2013, Pages 1373-1377
نویسندگان
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