کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1820324 | 1525783 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ab initio quantum chemical calculation of the pair potentials of superconductors
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Ab initio quantum chemical calculation on model clusters, Al14, Pb14, V16, Nb16, Sn14, In18 and Hg18, are presented to estimate the pairing potentials of superconductivity. The total energies of the clusters for the restricted Hartree-Fock (RHF) type and unrestricted Hartee-Fock (UHF) type singlet ground states and the triplet state are calculated by the hybrid DFT method of Gaussian G03 program. The energy differences between these states are correlated to the superconducting energy gap 2Î. By a slight modification of the geometry of the clusters from their positions in the parent crystalline lattice, reasonable 2Î values are obtained. We regard the UHF type singlet state (mixed singlet state, MS) as to represent the antiferromagnetic metallic state and it is the state for superconductivity. Comparing the calculated results with other metal clusters we propose a general rule for appearance of superconductivity in elementary metals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volumes 445â448, 1 October 2006, Pages 150-153
Journal: Physica C: Superconductivity and its Applications - Volumes 445â448, 1 October 2006, Pages 150-153
نویسندگان
Jiro Tanaka,