کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1813921 1025642 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electric-field effect on shallow impurity ground state in nanowire superlattice
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Electric-field effect on shallow impurity ground state in nanowire superlattice
چکیده انگلیسی
We have developed a variational formalism to analyze the effect of electric field on the donor ground state in a nanowire superlattice with cylindrical cross-section. The trial function is taken as a product of the free-electron ground state wave function with an envelope function that is a solution of a differential equation arising from the Schrödinger variational principle. We establish a close relationship between the donor ground state energy and density of charge induced by the unbound electron at the point of donor location. Also, we show that electric field applied along the crystal growth direction can easily shift the peak position of the free-electron density distribution from the central well toward one of the nanowire ends, providing a variation of the average electron-ion separation and a considerable alteration of the donor ground state energy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 404, Issue 2, 28 February 2009, Pages 180-183
نویسندگان
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