کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1515852 | 1511554 | 2012 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pair-hopping mechanism of superconductivity activated by the nano-space layered structure Pair-hopping mechanism of superconductivity activated by the nano-space layered structure](/preview/png/1515852.png)
Criterion for occurrence of the high-temperature superconductivity by the pair-hopping mechanism in layered materials is given. Based on the multi-reference density functional theory, vanishing inter-layer single particle hopping processes around the Fermi level and appearance of high-energy unoccupied orbitals mediating the Coulomb-repulsion driven pair scattering among the layers in the ordinal band-structure calculation certify appearance of the super-pair-hopping processes as the off-diagonal process of the quantum density–density fluctuation. The criterion is certified for α-K0.25TiNClα-K0.25TiNCl in the band structure calculation using the generalized gradient approximation.
► Mechanism of layered superconductors with unexpectedly high Tc is given.
► The inter-layer pair-hopping mechanism can provide enhancement of Tc.
► Criteria on the pair-hopping mechanism are given.
► Application for an existing material of KxTiNCl is given.
Journal: Journal of Physics and Chemistry of Solids - Volume 73, Issue 12, December 2012, Pages 1546–1549