کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1600371 | 1515880 | 2012 | 5 صفحه PDF | دانلود رایگان |
Electronic structures of three superconducting rare-earth iron silicides (Lu;Y;Sc)2Fe3Si5 and non-superconducting Lu2Ru3Si5, adopting a tetragonal crystal structure (P4/mnc), have been calculated employing the full-potential local-orbital method within the density functional theory. The investigations were focused particularly on the band structures and Fermi surfaces, existing in four bands and containing rather three-dimensional electronlike and holelike sheets. They support an idea of unconventional multi-band superconductivity in these ternaries, proposed earlier by other authors for Lu2Fe3Si5, based on heat-capacity, resistivity, electromagnetic and muon spin rotation measurements. Finally, a discussion on differences in the electronic structures between the investigated here and other common families of iron-based superconductors is carried out.
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► Superconducting (Lu;Y;Sc)2Fe3Si5 studied by LDA band structure calculations.
► Electronic structure of the non-superconducting Lu2Ru3Si5 counterpart investigated.
► Similarity of 3D Fermi surfaces in the three multi-band superconductors.
Journal: Intermetallics - Volume 31, December 2012, Pages 186–190