拉曼散射
凝聚态物理
拉曼光谱
电荷密度波
材料科学
兴奋剂
超导电性
声子
分子振动
散射
背景(考古学)
物理
光学
生物
古生物学
作者
A. Yu. Glamazda,Azat Sharafeev,Robert Bohle,P. Lemmens,Kwang‐Yong Choi,F. C. Chou,Raman Sankar
摘要
The vibrational and electronic properties of the Pb-doped dichalcogenide PbxTaSe2 (x = 0, 0.25, 0.33, 0.5, 0.75, and 1) have been investigated using Raman scattering experiments. A marked variation of the main vibrational modes with Pb concentration x is observed. The concentration dependence of the vibrational modes resembles the dependence of the vibrational modes in TaSe2 on the number of crystallographic layers along the c-axis direction. The temperature and polarization dependences of Raman spectra of PbxTaSe2 revealed additional broad modes in the low-frequency regime, which are discussed in the context of the remnant charge density wave, induced disorder, or PbSe phase formed in the interface of Pb and TaSe2 layers.
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