Magnetism and Superconductivity in the Two-Dimensional 16 Band d-p Model for Iron-Based Superconductors - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: The electronic states of the Fe2As2 plane in iron-based superconductors areinvestigated on the basis of the two-dimensional 16-band d-p model whichincludes the Coulomb interaction on a Fe site: the intra- and inter-orbitaldirect terms U and U-, the Hund-s coupling J and the pair-transfer J-. Usingthe random phase approximation RPA, we obtain the magnetic phase diagramincluding the stripe and the incommensurate order on the U-J plane. We alsosolve the superconducting gap equation within the RPA and find that, for largeJ, the most favorable pairing symmetry is extended s-wave whose order parameterchanges its sign between the hole pockets and the electron pockets, while it isdxy-wave for small J.



Author: Yuki Yanagi, Youichi Yamakawa, Yoshiaki Ōno

Source: https://arxiv.org/



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