کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1519131 | 1511621 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the propagation of electron screening in disordered conductors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In condensed matter theories within the nonrelativistic framework, the screening of electrons in a free space takes place instantaneously, i.e., at infinite speed. In this paper, considering the screening in disordered (or random) systems, we show that it propagates at a finite speed of (â/λ)â/Ï, depending on a ratio â/λ of the electron mean free path â and screening length λ, where â/Ï is the propagation speed of electrons between impurity potentials, which is identical to the Fermi velocity, and Ï the electron elastic scattering time, thereby indicating that if the condition â⪢λ holds like a situation in ordinary dirty conductors, the influence of retardation on the screening can be ignored safely in the same theoretical framework as above.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 68, Issue 1, January 2007, Pages 87-90
Journal: Journal of Physics and Chemistry of Solids - Volume 68, Issue 1, January 2007, Pages 87-90
نویسندگان
I. Tomita, A. Suzuki,