Pressure Dependence of Absorption Edge, Luminescence Peak and Raman Frequency in Wolffram's Red Salt
Pressure Dependence of Absorption Edge, Luminescence Peak and Raman Frequency in Wolffram's Red Salt
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Wolffram 红盐中吸收边、发光峰和拉曼频率的压力依赖性
DOI：
10.1143/jpsj.54.483
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
K. Hoh
中科院分区：
文献类型：
--
作者：
H. Tanino;N. Koshizuka;Koichi Kobayashi;M. Yamashita;K. Hoh
研究了高压下Wolffram红盐的吸收、发光和拉曼光谱。结果表明，准一维电子-声子系统不是通过降低电子-声子耦合能，而是通过增加转移能，随压力不断地从大气压下的中等耦合态向弱耦合态转变。由于随着压力的增加，铂IV-氯的距离随着压力的减小而增大，因此认为随着压力的增加，氯原子在铂IV附近的对称伸缩振动的声子能量降低，能隙迅速减小，直到0.2 Gpa。
Absorption, luminescence and Raman spectra are studied under high pressure in Wolffram's red salt. It is suggested that the quasi-one-dimensional electron-phonon system is continuously changed by pressure from a moderate coupling state at atmospheric pressure to a weak coupling state, not by decreasing the electron-phonon coupling energy, but by increasing the transfer energy. The decrease of the phonon energy of the symmetric stretching vibration of Cl around Pt IV and the rapid decrease of the energy gap with the pressure increase up to 0.2 GPa are thought because the Pt IV -Cl distance would increase with increasing pressure as the Pt IV -Pt II distance decreases.