Enhancement of Hybridization between Two- and One-Dimensional Bands due to Coulomb and Spin–Orbit Interactions in Sr2RuO4

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概要

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• Phenomenological model calculations of Sr2RuO4 show that the marked enhancement of the hybridization between the two-dimensional $d_{xy}$ band and one-dimensional $d_{yz,zx}$ bands is caused by the Coulomb and spin–orbit interactions. Owing to the enhanced hybridization effect, the van Hove singularity (vHS) of the $\gamma$ band in the vicinity of $M$ decreases to about 40 meV above the Fermi level ($E_{\text{F}}$). Moreover, the vHS approaches $E_{\text{F}}$ owing to the electron–phonon interaction (EPI). A few peculiar phonon modes interacting with the one-dimensional orbital component via the vHS can mediate the $ p$-wave paring in Sr2RuO4.

• 2010-12-15

著者

• AIURA Yoshihiro

  National Institute of Advanced Industrial Science and Technology

• HASE Izumi

  National Institute of Advanced Industrial Science and Technology

• Iwasawa Hideaki

  Hiroshima Synchrotron Radiation Center Hiroshima University

• Yoshida Yoshiyuki

  National Inst. Advanced Industrial Sci. And Technol. Ibaraki Jpn

• Iwasawa Hideaki

  Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima, Hiroshima 739-0046, Japan

• Koikegami Shigeru

  Second Lab, LLC, Tsukuba, Ibaraki 305-0045, Japan

• Aiura Yoshihiro

  National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan

• Hase Izumi

  National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan

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