 Reduced iron ordered moment and negative T C -pressure coefficient in iron-arsenide superconductorsGuo-Qiang Liu () The European Physical Journal B: Condensed Matter and Complex Systems, 2015, vol. 88, issue 3, 1-9 Abstract: The striped antiferromagnetic phase of iron-arsenides is investigated by the density functional calculations including Coulomb repulsion. Two low moment solutions with m ≈ 0.4 μ B and m ≈ 1.0 μ B have been found from calculations. The electronic structures indicate that the low moment states originate in the strong orbital hybridization between antiferromagnetic Fe neighbors. Therefore, the geometry of FeAs 4 tetrahedron, which is characterized by a parameter of h As /a, is crucial to the low moment states. We show that the puzzling negative T C -pressure coefficient of iron-arsenides can be consistently explained by the obtained low moment states. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015 Keywords: Solid State and Materials (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:88:y:2015:i:3:p:1-9:10.1140/epjb/e2015-50780-7 Ordering information: This journal article can be ordered from DOI: 10.1140/epjb/e2015-50780-7 Access Statistics for this article The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences |
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