Possible three dimensional nodes in the $s{\pm}$ superconducting gap of BaFe$_2$(As$_{1-x}$P$_x$)$_2$

Katsuhiro Suzuki; Hidetomo Usui; Kazuhiko Kuroki

doi:10.1143/JPSJ.80.013710

paper

Possible three dimensional nodes in the $s \pm$ superconducting gap of BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

arXiv:1010.3542 · doi:10.1143/JPSJ.80.013710

Abstract

We examine theoretically the superconducting state of BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$ , an isovalent doping 122 iron pnictide superconductor. We construct a three dimensional ten orbital model from first principles band calculation, and investigate the superconducting gap within the spin fluctuation mediated pairing mechanism. The gap is basically $s \pm$ , where the gap changes its sign between electron and hole Fermi surfaces, but three dimensional nodal structures appear in the largely warped hole Fermi surface having strong $Z^{2} / X Z / Y Z$ orbital character. The present result, together with our previous study on 1111 systems, explains the strong material dependence of the superconducting gap in the iron pnictides.

4 pages,4 figures

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Possible three dimensional nodes in the s± superconducting gap of BaFe2​(As1−x​Px​)2​

Abstract

References in corpus (18)

Cited by in corpus (19)

Possible three dimensional nodes in the $s \pm$ superconducting gap of BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$