کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1810193 | 1525234 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On-site and inter-site electron–phonon interaction in 2D Hubbard model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
An exact diagonalization study of Hubbard model having on-site electron–phonon interaction and inter-site phonon mediated interaction shows that on-site electron–phonon interaction generates an effective attraction between electrons which eventually forms on-site bipolaron. On the other hand, phonon mediated interaction between electrons at nearest-neighbor sites is suppressed by on-site Coulomb repulsion initially, but at certain larger strength this interaction strengthen the on-site electron–phonon interaction. There is also formation of neighboring-site bipolaron. Results show that interplay between electron–electron interaction and electron–phonon interaction is very much relevant.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 412, 1 March 2013, Pages 83–86
Journal: Physica B: Condensed Matter - Volume 412, 1 March 2013, Pages 83–86
نویسندگان
S. Nath, N.S. Mondal, N.K. Ghosh,