%0 Journal Article
%A Yu, Runze
%A Hojo, Hajime
%A Watanuki, Tetsu
%A Mizumaki, Masaichiro
%A Mizokawa, Takashi
%A Oka, Kengo
%A Kim, Hyunjeong
%A Machida, Akihiko
%A Sakaki, Kouji
%A Nakamura, Yumiko
%A Agui, Akane
%A Mori, Daisuke
%A Inaguma, Yoshiyuki
%A Schlipf, Martin
%A Rushchanskii, Konstantin
%A Ležaić, Marjana
%A Matsuda, Masaaki
%A Ma, Jie
%A Calder, Stuart
%A Isobe, Masahiko
%A Ikuhara, Yuichi
%A Azuma, Masaki
%T Melting of Pb Charge Glass and Simultaneous Pb–Cr Charge Transfer in PbCrO $_{3}$ as the Origin of Volume Collapse
%J Journal of the American Chemical Society
%V 137
%N 39
%@ 1520-5126
%C Washington, DC
%I American Chemical Society
%M FZJ-2015-06981
%P 12719 - 12728
%D 2015
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000362628300046
%$ pmid:26374486
%R 10.1021/jacs.5b08216
%U https://juser.fz-juelich.de/record/276653