کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1819301 | 1525761 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Model construction and pairing symmetry for the iron-based oxypnictides
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
PC-19-INV: In order to clarify the mechanism of superconductivity in the iron-based compound recently discovered by Hosono's group, we have first constructed a tight-binding model in terms of the maximally localized Wannier orbitals from a first-principles electronic structure calculation. The model has turned out to involve all the five Fe 3d bands. This is used to calculate the spin and charge susceptibilities with the five-band random-phase approximation, which are then plugged into the linearised Eliashberg equation. For a doped system we obtain an unconventional s-wave pairing with sign-reversing gap functions. To be more precise, the gap function is a 5Ã5 matrix, for which the diagonal elements mainly comprise dx2-y2 and dyz,dxz orbital components. The strong dependence of the gap between different orbitals may be observed experimentally.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity - Volume 469, Issues 15â20, 15 October 2009, Pages 890-893
Journal: Physica C: Superconductivity - Volume 469, Issues 15â20, 15 October 2009, Pages 890-893
نویسندگان
Hideo Aoki,