Synthesis and spectroscopic characterization of alkali-metal intercalated ZrSe2.
Synthesis and spectroscopic characterization of alkali-metal intercalated ZrSe2.
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DOI：
10.1039/c7dt03756b
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发表时间：
2017-11
影响因子：
4
通讯作者：
K. Nikonov;N. Ehlen;B. Senkovskiy;Nihit Saigal;A. Fedorov;A. Nefedov;C. Wöll;G. Di Santo;L. Petaccia;A. Grüneis
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文献类型：
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作者：
K. Nikonov;N. Ehlen;B. Senkovskiy;Nihit Saigal;A. Fedorov;A. Nefedov;C. Wöll;G. Di Santo;L. Petaccia;A. Grüneis
我们报告了碱金属插层 ZrSe2 单晶的合成和光谱表征。 ZrSe2 通过化学气相传输产生，然后嵌入 Li。插层是从液相（通过丁基锂）和气相进行的。插层ZrSe2的拉曼光谱揭示了拉曼活性A1g和Eg声子模式的声子能量转移、双声子模式的消失和新的低波数拉曼模式。角分辨光电子能谱用于绘制费米面图，显示电子浓度为 4.7 × 1014 cm-2。我们还将 K 和 Cs 气相插层到 ZrSe2 中，并观察到与 Li 情况类似的拉曼模式变化。
We report on the synthesis and spectroscopic characterization of alkali metal intercalated ZrSe2 single crystals. ZrSe2 is produced by chemical vapour transport and then Li is intercalated. Intercalation is performed from the liquid phase (via butyllithium) and from the vapour phase. Raman spectroscopy of intercalated ZrSe2 reveals phonon energy shifts of the Raman active A1g and Eg phonon modes, the disappearance of two-phonon modes and new low wavenumber Raman modes. Angle-resolved photoemission spectroscopy is used to perform a mapping of the Fermi surface revealing an electron concentration of 4.7 × 1014 cm-2. We also perform vapour phase intercalation of K and Cs into ZrSe2 and observe similar changes in the Raman modes as for the Li case.