Magnetic structures and electronic properties of cubic-pyrochlore ruthenates from first principles

M. T. Huebsch, Y. Nomura, S. Sakai, R. Arita

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The magnetic ground states of R 2Ru2O7 and A 2Ru2O7 with R = Pr, Gd, Ho, and Er, as well as A = Ca, Cd are predicted devising a combination of the cluster-multipole (CMP) theory and spin-density-functional theory (SDFT). The strong electronic correlation effects are estimated by the constrained-random-phase approximation (cRPA) and taken into account within the dynamical-mean-field theory (DMFT). The target compounds feature d-orbital magnetism on Ru4+ and Ru5+ ions for R and A, respectively, as well as f-orbital magnetism on the R site, which leads to an intriguing interplay of magnetic interactions in a strongly correlated system. We find CMP + SDFT is capable of describing the magnetic ground states in these compounds. The cRPA captures a difference in the screening strength between R 2Ru2O7 and A 2Ru2O7 compounds, which leads to a qualitative and quantitative understanding of the electronic properties within DMFT.

Original languageEnglish
Article number194003
JournalJournal of Physics Condensed Matter
Volume34
Issue number19
DOIs
Publication statusPublished - 2022 May 11
Externally publishedYes

Keywords

  • electronic properties
  • first-principles calculation
  • magnetic structure prediction
  • noncollinear magnetism
  • ruthenates
  • strongly correlated electron system

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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