Electronic and electronic-vibrational phenomena in the new organic conductor ϰ-(ET)2[Hg(SCN)2Cl] with a metal-insulator transition
Electronic and electronic-vibrational phenomena in the new organic conductor ϰ-(ET)2[Hg(SCN)2Cl] with a metal-insulator transition
复制标题
具有金属-绝缘体转变的新型有机导体ϰ-(ET)2[Hg(SCN)2Cl]中的电子和电子振动现象
DOI：
10.1134/1.1130040
复制
发表时间：
1997
影响因子：
0.6
通讯作者：
R. Lyubovskaya
中科院分区：
文献类型：
--
作者：
R. Vlasova;N. Drichko;O. Drozdova;R. Lyubovskaya
研究了具有金属-绝缘体跃迁的新型有机导体Hg-（ET）2[Hg（SCN）2Cl]在700-5500和9000-40 000 cm-1光谱区的反射光谱和300 K偏振光下的光导光谱。将所得光谱与基于ET分子的相关同构导体的相应光谱进行了比较，并对所研究化合物的晶体结构性质进行了分析。在光谱区域700-5500 cm-1，二聚体（ET）2+的ET分子之间的电子跃迁已经被确定，作为该跃迁与ET分子的完全对称的分子内振动相互作用的结果而产生的电子振动结构的特征也被确定。发现ET分子间的二聚体相互作用越强的导体，其相变温度越高。
The reflection spectra and optical conductivity spectra of the new organic conductorϰ-(ET)2[Hg(SCN)2Cl] with a metal-insulator transition in the spectral regions 700–5500 and 9000–40 000 cm−1have been studied in polarized light at 300 K. A comparisonis made between the spectra obtained and the corresponding spectra of related isostructural conductors based on the ET molecule, and also the properties of the crystal structure of the investigated compounds. An electronic transition between the ET molecules of the dimer (ET)2+in the spectral region 700–5500 cm−1has been identified, as have the features of the electronic-vibrational structure arising as a consequence of the interaction of this transition with the completely symmetric intramolecular vibrations of the ET molecule. It is found that the conductor with the stronger dimer interaction between the ET molecules has the higher the transition temperature.