Intermetallic Charge Transfer in V-Substituted PbCrO3

Takahiro Ogata, Yuki Sakai, Takumi Nishikubo, Takashi Mizokawa, Masaichiro Mizumaki, Koomok Lee, Qiumin Liu, Masaki Azuma

研究成果: Article査読

抄録

PbCrO3 features an unusual charge distribution Pb0.52+Pb0.54+Cr3+O3 with Pb charge disproportionation at ambient pressure. A charge transfer between Pb and Cr is induced by the application of pressure resulting in Pb2+Cr4+O3 charge distribution and a large volume collapse. Here, structural and charge distribution changes in PbCr1-xVxO3 are investigated. Despite a cubic crystal structure in 0 ≤ x ≤ 0.60, discontinuous reduction in the unit cell volume was observed between x = 0.35 and 0.40. Hard X-ray photoemission spectroscopy confirmed the change in Pb charge state from the coexisting Pb2+ and Pb4+ at x = 0.35 to single Pb2+ at x = 0.40. This indicates that V substitution stabilizes the high pressure cubic Pb2+Cr4+O3-Type phase. With further increase in the V substitution, the PbVO3-Type polar tetragonal phase appeared at x = 0.80.

本文言語English
ページ(範囲)9427-9431
ページ数5
ジャーナルInorganic Chemistry
60
13
DOI
出版ステータスPublished - 2021 7 5

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学

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