title: Interplay among Coulomb interaction, spin-orbit interaction, and multiple electron-boson interactions in Sr2RuO4.
abstract: Using polarization- and hν-dependent angle-resolved photoemission spectroscopy, we uncovered the fine details of a quasiparticle's dynamics of a typical multiband superconductor, Sr2RuO4. We found strong hybridization between the in-plane and out-of-plane quasiparticles via the Coulomb and spin-orbit interactions. This effect enhances the quasiparticle mass due to the inflow of out-of-plane quasiparticles into the two-dimensional Fermi surface sheet, where the quasiparticles are further subjected to the multiple electron-boson interactions. We suggest that the spin-triplet p-wave superconductivity of Sr2RuO4 is phonon mediated.
authors.affiliation: Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-0046, Japan. h-iwasawa@hiroshima-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Iwasawa
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.forename: I
authors.initials: I
authors.lastname: Hase
authors.forename: S
authors.initials: S
authors.lastname: Koikegami
authors.forename: H
authors.initials: H
authors.lastname: Hayashi
authors.forename: J
authors.initials: J
authors.lastname: Jiang
authors.forename: K
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authors.lastname: Shimada
authors.forename: H
authors.initials: H
authors.lastname: Namatame
authors.forename: M
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Aiura