TY - JOUR
T1 - Metal-insulator transition in a pyrochlore-type ruthenium oxide, Hg 2Ru2O7
AU - Yamamoto, Ayako
AU - Sharma, Peter A.
AU - Okamoto, Yoshihiko
AU - Nakao, Aiko
AU - Aruga Katori, Hiroko
AU - Niitaka, Seiji
AU - Hashizume, Daisuke
AU - Takagi, Hidenori
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2007/4
Y1 - 2007/4
N2 - A new pyrochlore ruthenium oxide, Hg2Ru2O 7, was synthesized under a high pressure of 6 GPa. In contrast to the extensively studied Ru4+ oxides, this compound possesses a novel Ru5+ valence state, corresponding to a half-filled t 2g3 electron configuration. Hg2Ru 2O7 exhibits a first order metal-insulator transition at 107 K, accompanied by a structural transition from a cubic to lower symmetry. The behavior of the magnetic susceptibility suggests the possible formation of a spin singlet in the insulating low temperature state.
AB - A new pyrochlore ruthenium oxide, Hg2Ru2O 7, was synthesized under a high pressure of 6 GPa. In contrast to the extensively studied Ru4+ oxides, this compound possesses a novel Ru5+ valence state, corresponding to a half-filled t 2g3 electron configuration. Hg2Ru 2O7 exhibits a first order metal-insulator transition at 107 K, accompanied by a structural transition from a cubic to lower symmetry. The behavior of the magnetic susceptibility suggests the possible formation of a spin singlet in the insulating low temperature state.
KW - Geometrical frustration
KW - Metal-insulator transition
KW - Pyrochlore-type structure
KW - Ruthenium oxide
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U2 - 10.1143/JPSJ.76.043703
DO - 10.1143/JPSJ.76.043703
M3 - Article
AN - SCOPUS:34247150708
VL - 76
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 4
M1 - 043703
ER -