Random phase approximation for superconducting states in multi-orbital Hubbard models with spin-orbit coupling

Kazutaka Nishiguchi, Tomonori Shirakawa, Hiroshi Watanabe, Seiji Yunoki

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1 Citation (Scopus)

Abstract

To better understand electronic and magnetic properties of superconducting (SC) states in 5d transition metal oxides, we derive an analytical formula of the dynamical correlation function for multi-orbital systems with the spin-orbit coupling (SOC), which is accessible to the experimental responses. Starting with a multi-orbital BCS Hamiltonian including the SC gap function, we introduce the dynamical correlation function in the non-interacting case. Based on the diagrammatic techniques, we derive the dynamical correlation function for the interacting case within the random phase approximation. With the help of a numerical calculation, we also show the temperature dependence of the magnetic susceptibility for two different SC states in the presence of the SOC.

Original languageEnglish
Article number052013
JournalJournal of Physics: Conference Series
Volume807
Issue number5
DOIs
Publication statusPublished - 2017 Apr 6

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orbits
orbitals
approximation
metal oxides
transition metals
magnetic properties
magnetic permeability
temperature dependence
electronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Random phase approximation for superconducting states in multi-orbital Hubbard models with spin-orbit coupling. / Nishiguchi, Kazutaka; Shirakawa, Tomonori; Watanabe, Hiroshi; Yunoki, Seiji.

In: Journal of Physics: Conference Series, Vol. 807, No. 5, 052013, 06.04.2017.

Research output: Contribution to journalArticle

Nishiguchi, Kazutaka ; Shirakawa, Tomonori ; Watanabe, Hiroshi ; Yunoki, Seiji. / Random phase approximation for superconducting states in multi-orbital Hubbard models with spin-orbit coupling. In: Journal of Physics: Conference Series. 2017 ; Vol. 807, No. 5.
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