Pressure-Induced Insulator-to-Metal-to-Insulator Transitions in One-Dimensional Bis(dimethylglyoximato)platinum(II), Pt(dmg)2
Pressure-Induced Insulator-to-Metal-to-Insulator Transitions in One-Dimensional Bis(dimethylglyoximato)platinum(II), Pt(dmg)2
复制标题
一维双(二甲基乙肟)铂(II)、Pt(dmg)2 中压力诱导的绝缘体到金属到绝缘体的转变
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
K. Yakushi
中科院分区：
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作者：
K. Takeda;I. Shirotani;K. Yakushi
本文详细研究了一维双（二甲基乙醛肟）合铂（II）Pt（dmg）_2在高压下的电性、吸收光谱和X射线衍射。电阻率随着压力的增加而急剧下降，并在6.5 GPa左右达到最小值，然后随着压力的增加而缓慢增加。复合物中压力诱导的绝缘体-金属-绝缘体（IMI）转变分别在5和6.5 GPa左右。在25000 - 3000 cm-1区域的吸收光谱是在室温下用金刚石压砧室测量的，最高可达10 GPa。基于5dz 2 −6pz跃迁的吸收带在660 nm附近显著地向更长的波长移动，压力移动的速率为− 2300 cm-1/GPa。5dz 2和6pz带之间的光学能隙在约5GPa处变为零。Pt（dmg）2的吸收光谱在压力附近发生明显变化，表现出IMI跃迁。利用同步辐射，粉末…
Electrical resistivities, absorption spectra, and X-ray diffraction of one-dimensional bis(dimethylglyoximato)platinum(II), Pt(dmg)2, have been studied in detail at high pressures. The resistivity drastically decreases with increasing pressure and reaches the minimum at around 6.5 GPa and then slowly increases with increasing pressure above this pressure. The pressure-induced insulator-to-metal-to-insulator (IMI) transitions in the complex have been found at around 5 and 6.5 GPa, respectively. The absorption spectra in the 25000−3000 cm-1 region were measured with a diamond-anvil cell up to 10 GPa at room temperature. The absorption band based on the 5dz2−6pz transition at around 660 nm shifts remarkably to longer wavelengths with a rate of the pressure shift of − 2300 cm-1/GPa. The optical energy gap between 5dz2 and 6pz bands becomes zero at around 5 GPa. The absorption spectra of Pt(dmg)2 markedly change at around the pressures which show the IMI transitions. By use of synchrotron radiation, the powder...