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

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13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)12719-12728
Number of pages10
JournalJournal of the American Chemical Society
Volume137
Issue number39
DOIs
Publication statusPublished - 2015 Oct 7
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Yu, R., Hojo, H., Watanuki, T., Mizumaki, M., Mizokawa, T., Oka, K., Kim, H., Machida, A., Sakaki, K., Nakamura, Y., Agui, A., Mori, D., Inaguma, Y., Schlipf, M., Rushchanskii, K. Z., Ležaić, M., Matsuda, M., Ma, J., Calder, S., ... Azuma, M. (2015). Melting of Pb Charge Glass and Simultaneous Pb-Cr Charge Transfer in PbCrO3 as the Origin of Volume Collapse. Journal of the American Chemical Society, 137(39), 12719-12728. https://doi.org/10.1021/jacs.5b08216