Metal-Insulator Transition in a Pyrochlore-type Ruthenium Oxide, Hg_2Ru_2O_7(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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A new pyrochlore ruthenium oxide, Hg_2Ru_2O_7. was synthesized under a high pressure of 6 GPa. In contrast to the extensively studied Ru^<4+> oxides, this compound possesses a novel Ru^<5+> valence state, corresponding to a half-filled t_<2g>^3 electron configuration. Hg_2Ru_2O_7 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.
- 社団法人日本物理学会の論文
- 2007-04-15
著者
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Aruga Katori
Riken(inst. Physical And Chemical Res.) Saitama
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Aruga Katori
Riken
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Aruga Katori
Riken (the Institute Of Physical And Chemical Research):crest Japan Science And Technology Agency (j
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TAKAGI Hidenori
RIKEN
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Niitaka Seiji
Riken (the Institute Of Physical And Chemical Research):crest Japan Science And Technology Agency (j
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YAMAMOTO Ayako
RIKEN (The Institute of Physical and Chemical Research) and CREST-JST
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Okamoto Yoshihiko
Univ. Tokyo Chiba
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Okamoto Yoshihiko
Riken (the Institute Of Physical And Chemical Research):crest Japan Science And Technology Agency (j
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HASHIZUME Daisuke
RIKEN
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SHARMA Peter
RIKEN (The Institute of Physical and Chemical Research)
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NAKAO Aiko
RIKEN (The Institute of Physical and Chemical Research)
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Yamamoto Ayako
Riken (the Institute Of Physical And Chemical Research):crest Japan Science And Technology Agency (j
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Takagi Hidenori
Riken (the Institute Of Physical And Chemical Research):crest Japan Science And Technology Agency (j
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Niitaka Seiji
RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198
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Niitaka Seiji
RIKEN
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Yamamoto Ayako
RIKEN
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Okamoto Yoshihiko
RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198
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