Dynamical valence fluctuation at the charge-density-wave phase boundary in iodide-bridged Pt compound [Pt(chxn)2I]I2.
We synthesized a novel iodo-bridged linear chain platinum compound, having the quasi-two-dimensional charge-density-wave (CDW) ground state and the smallest band gap. In this compound, we discovered an anomalous valence state in the boundary region at which the CDW phase alternates in the crystal by means of ESR, X-ray diffuse scattering, STM, and electrical resistivity. This anomalous state can be explained by the fast fluctuation between Pt(IV)-I...Pt(II) and Pt(II)...I-Pt(IV) in the double well potential. This is the first observation of the dynamical fluctuation of the CDW phase among the quasi one-dimensional halogen-bridged complexes.
Takaishi
Shinya
S
Department of Chemistry, Graduate School of Science, Tohoku University and CREST (JST), 6-3 Aza-aoba, Aramaki, Sendai 980-8578, Japan. takaishi@agnus.chem.tohoku.ac.jp
Kawakami
Daisuke
D
Yamashita
Masahiro
M
Sasaki
Mari
M
Kajiwara
Takashi
T
Miyasaka
Hitoshi
H
Sugiura
Ken-Ichi
K
Wakabayashi
Yusuke
Y
Sawa
Hiroshi
H
Matsuzaki
Hiroyuki
H
Kishida
Hideo
H
Okamoto
Hiroshi
H
Watanabe
Harutaka
H
Tanaka
Hisaaki
H
Marumoto
Kazuhiro
K
Ito
Hiroshi
H
Kuroda
Shin-Ichi
S