Melting of Pb Charge Glass and Simultaneous Pb-Cr Charge Transfer in PbCrO3 as the Origin of Volume Collapse

Runze Yu*, Hajime Hojo, Tetsu Watanuki, Masaichiro Mizumaki, Takashi Mizokawa, Kengo Oka, Hyunjeong Kim, Akihiko Machida, Kouji Sakaki, Yumiko Nakamura, Akane Agui, Daisuke Mori, Yoshiyuki Inaguma, Martin Schlipf, Konstantin Z. Rushchanskii, Marjana Ležaić, Masaaki Matsuda, Jie Ma, Stuart Calder, Masahiko IsobeYuichi Ikuhara, Masaki Azuma

*この研究の対応する著者

研究成果: Article査読

23 被引用数 (Scopus)

抄録

A metal to insulator transition in integer or half integer charge systems can be regarded as crystallization of charges. The insulating state tends to have a glassy nature when randomness or geometrical frustration exists. We report that the charge glass state is realized in a perovskite compound PbCrO3, which has been known for almost 50 years, without any obvious inhomogeneity or triangular arrangement in the charge system. PbCrO3 has a valence state of Pb2+0.5Pb4+0.5Cr3+O3 with Pb2+-Pb4+ correlation length of three lattice-spacings at ambient condition. A pressure induced melting of charge glass and simultaneous Pb-Cr charge transfer causes an insulator to metal transition and ∼10% volume collapse.

本文言語English
ページ(範囲)12719-12728
ページ数10
ジャーナルJournal of the American Chemical Society
137
39
DOI
出版ステータスPublished - 2015 10 7
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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