کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594759 | 1515672 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interband interactions and three-square-well potentials on the superconductivity of MgB2
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Interband interactions and three-square-well potentials on the superconductivity of MgB2 Interband interactions and three-square-well potentials on the superconductivity of MgB2](/preview/png/1594759.png)
چکیده انگلیسی
Superconductivity in magnesium diboride, MgB2, is described within the framework of Bogoliubov-Valatin two-band and two-gap formalism, employing a three-square-well potential model. The expressions for the superconducting transition temperature, Tc, and the isotope exponent, β, are derived. Numerical calculations with the expressions newly reproduce near-experimental Tc(=38.50K) and β(=0.38). The influences of the interband attractive electron-acoustic (λÏÏ) and electron-optical (kÏÏ) phonons as well as repulsive Coulomb pseudopotential (μÏÏâ) on Tc and β are sketched. It is concluded that λÏÏ and kÏÏ have near-identical elevating effects on Tc and β but μÏÏâ has reverse effects, similar to the effect of interband impurity scattering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 37â38, October 2009, Pages 1510-1513
Journal: Solid State Communications - Volume 149, Issues 37â38, October 2009, Pages 1510-1513
نویسندگان
Obinna C. Abah, G.C. Asomba, C.M.I. Okoye,