Multipole ordering and collective excitations in the excitonic phase of Pr0.5Ca0.5CoO3

Tomoki Yamaguchi, Koudai Sugimoto, Yukinori Ohta

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


As an extension of our previous paper (Yamaguchi et al., 2017) [24], we study the carrier doping dependence of the excitonic condensation in Pr0.5Ca0.5CoO3 using the random-phase and mean-field approximations for the realistic five-orbital Hubbard model. We show that the spin-triplet excitonic phase with a magnetic multipole ordering is stable against the doping of carriers in a considerable range around Co3+ (or 3d6). We discuss experimental relevance of our results.

Original languageEnglish
Pages (from-to)37-39
Number of pages3
JournalPhysica B: Condensed Matter
Publication statusPublished - 2018 May 1
Externally publishedYes


  • Cobalt oxide
  • Collective mode
  • Excitonic phase
  • Magnetic multipole

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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