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Phase Diagram of the Two-dimensional 16-band d-p Model for Iron-based Superconductors
Phase Diagram of the Two-dimensional 16-band d-p Model for Iron-based Superconductors
Yanagi, Y.
Yamakawa, Y.
Ono, Y.
ron-based superconductors
16-Band d–p model
pairing symmetry
gap function
The electronic state of the Fe2As2 plane in iron-based superconductors is investigated on the basis of the two-dimensional 16-band d –p model. Using the random phase approximation for the on-site Coulomb interaction between Fe d electrons, we obtain the phase diagram including the magnetic ordered states and the superconductivity. It is found that the s±-wave superconductivity, where the gap functions have different signs between the electron pockets and the hole pockets, is realized near the incommensurate magnetic ordered phase with q～(π,π). The absolute values of the gap functions on the Fermi surfaces are almost isotropic but largely depend on the energy bands.
Elsevier
2010-12
eng
journal article
http://hdl.handle.net/10191/26911
https://niigata-u.repo.nii.ac.jp/records/2255
info:doi/10.1016/j.physc.2009.10.109
AA11461984
09214534
Physica. C, Superconductivity and its applications
Physica. C, Superconductivity and its applications
470
Supplement 1
S349
S350
https://niigata-u.repo.nii.ac.jp/record/2255/files/982.pdf
application/pdf
167.4 kB
2019-07-29