Temperature-and Pressure-Induced Charge-Density-Wave to Mott-Hubbard Phase Transitions in Quasi-One-Dimensional Bromine-Brodged Pd Compounds
Temperature-and Pressure-Induced Charge-Density-Wave to Mott-Hubbard Phase Transitions in Quasi-One-Dimensional Bromine-Brodged Pd Compounds
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准一维溴桥联 Pd 化合物中温度和压力诱导的电荷密度波到莫特-哈伯德相变
DOI：
10.1143/jpsj.81.074705
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
H. Matsuzaki
中科院分区：
文献类型：
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作者：
Hiroyuki Matsuda;Laszlo Toth;Kentaro Goto;Fumihiko Matsui;Tomohiro Matsushita^2;Mie Hashimoto;Chikako Sakai;Hideo Nojiri;Hiroshi Daimon;ALICE Collaboration (B. Abelev et al.);H. Matsuzaki
通过晶体结构分析和拉曼光谱研究了准一维 Br 桥联 Pd 化合物 [Pd(en)2Br](Cn–Y)2·H2O (n=4–9 和 12)（en：乙二胺，Cn–Y：磺基琥珀酸二烷基酯）中温度和压力引起的从电荷密度波 (CDW) 相到莫特-哈伯德 (MH) 相的转变。光谱学。通过对反映 CDW 振幅的桥溴位移 δ、相邻两个 Pd 离子之间的距离 L 以及对称 Pd-Br 拉伸模式的拉曼频率 ωS 的系统评估，我们证明 ωS 是 CDW 振幅的良好度量。通过仔细研究压力引起和温度引起的 CDW 到 MH 转变中 ωSin 的变化，我们讨论了此类材料中 CDW 到 MH 转变的性质。
Temperature- and pressure-induced transitions from the charge-density-wave (CDW) phase to the Mott–Hubbard (MH) phase in the quasi-one-dimensional Br-bridged Pd compound, [Pd(en)2Br](Cn–Y)2·H2O (n=4–9, and 12) (en: ethylenediamine, Cn–Y: dialkyl-sulfosuccinate), were investigated by means of crystal-structure analyses and Raman spectroscopy. From the systematic evaluations of the bridging-bromine displacements δ reflecting the CDW amplitudes, the distanceLbetween the neighboring two Pd ions, and the Raman frequency ωSof the symmetric Pd–Br stretching mode, we demonstrated that ωSis a good measure of the CDW amplitude. By scrutinizing the variations of ωSin the pressure-induced and the temperature-induced CDW-to-MH transitions, we discuss the nature of the CDW-to-MH transitions in this category of materials.