Off-site repulsion-induced triplet superconductivity: A possibility for chiral px+y-wave pairing in Sr2RuO4

Ryotaro Arita; Seiichiro Onari; Kazuhiko Kuroki; Hideo Aoki

doi:10.1103/PhysRevLett.92.247006

Off-site repulsion-induced triplet superconductivity: A possibility for chiral p_x+y-wave pairing in Sr₂RuO₄

Ryotaro Arita, Seiichiro Onari, Kazuhiko Kuroki, Hideo Aoki

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The pairing symmetry in one-band Hubbard model having off-site Coulomb repulsion on top of on-site repulsion as model for γ band of Sr ₂RuO₄ was discussed. It is observed that singlet pairing dominates over triplet for one-band Hubbard model for the γ band. The dynamic cluster approximations (DCA) and quantum Monte Carlo (QMC) method are also employed to investigate superconductivity in extended Hubbard Hamiltonian which models γ band in ruthenate. The Hubbard model is mapped to a self-consistently embedded cluster of Anderson impurities such that DCA incorporates nonlocal spatial fluctuations.

Original language	English
Article number	247006
Pages (from-to)	247006-1-247006-4
Journal	Physical Review Letters
Volume	92
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.92.247006
Publication status	Published - Jun 18 2004

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.92.247006

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title = "Off-site repulsion-induced triplet superconductivity: A possibility for chiral px+y-wave pairing in Sr2RuO4",

abstract = "The pairing symmetry in one-band Hubbard model having off-site Coulomb repulsion on top of on-site repulsion as model for γ band of Sr 2RuO4 was discussed. It is observed that singlet pairing dominates over triplet for one-band Hubbard model for the γ band. The dynamic cluster approximations (DCA) and quantum Monte Carlo (QMC) method are also employed to investigate superconductivity in extended Hubbard Hamiltonian which models γ band in ruthenate. The Hubbard model is mapped to a self-consistently embedded cluster of Anderson impurities such that DCA incorporates nonlocal spatial fluctuations.",

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AU - Aoki, Hideo

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AB - The pairing symmetry in one-band Hubbard model having off-site Coulomb repulsion on top of on-site repulsion as model for γ band of Sr 2RuO4 was discussed. It is observed that singlet pairing dominates over triplet for one-band Hubbard model for the γ band. The dynamic cluster approximations (DCA) and quantum Monte Carlo (QMC) method are also employed to investigate superconductivity in extended Hubbard Hamiltonian which models γ band in ruthenate. The Hubbard model is mapped to a self-consistently embedded cluster of Anderson impurities such that DCA incorporates nonlocal spatial fluctuations.

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Off-site repulsion-induced triplet superconductivity: A possibility for chiral p_x+y-wave pairing in Sr₂RuO₄

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