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

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.5b08216· OSTI ID:1271884
 [1];  [1];  [2];  [3];  [4];  [1];  [5];  [2];  [5];  [5];  [2];  [6];  [6];  [7];  [7];  [7];  [8];  [8];  [8];  [4] more »;  [4];  [1] « less
  1. Tokyo Inst. of Technology (Japan)
  2. Japan Atomic Energy Agency (JAEA), Hyogo (Japan)
  3. Japan Synchrotron Radiation Research Institute, Sayo, Hyogo (Japan)
  4. Univ. of Tokyo (Japan)
  5. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
  6. Gakushuin University, Tokyo (Japan)
  7. Forschungszentrum Julich (Germany)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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. In this paper, 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.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1271884
Journal Information:
Journal of the American Chemical Society, Vol. 137, Issue 39; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Hybridization-Switching Induced Mott Transition in A B O 3 Perovskites journal January 2019
Systematic charge distribution changes in Bi- and Pb-3d transition metal perovskites journal January 2018

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