Physics – Condensed Matter – Superconductivity
Scientific paper
2010-05-17
Phys. Rev. B 82, 064518 (2010)
Physics
Condensed Matter
Superconductivity
10 pages, 9 figures, added discussions and references, published in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.82.064518
We study the electronic states and the superconductivity in the two-dimensional 16-band d-p model coupled with A1g, B1g and Eg local phonons and obtain the rich phase diagram including the magnetic, charge and orbital ordered phases on the parameter plane of the Coulomb and electron-phonon interactions. When the electron-phonon interaction is dominant, the charge fluctuations induce the s++ wave superconductivity, while when the Coulomb interaction is dominant, the magnetic fluctuations induce the s+- wave superconductivity. Remarkably, the orbital fluctuations are enhanced due to the cooperative effects of the Coulomb and electron-phonon interactions and induce the s++ wave and the nodal s+- wave superconductivities.
Adachi Naoko
Ono Yoshiaki
Yamakawa Youichi
Yanagi Yuki
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