Growth, characterization, and Raman spectra of the 1T phases of TiTe2, TiSe2, and TiS2

被引：0

作者：

唐筱芳 ^{[1
,2
,3
]}

朱双兴 ^{[3
]}

刘豪 ^{[3
]}

章晨 ^{[3
]}

吴旗仪 ^{[3
]}

刘子腾 ^{[3
]}

宋姣姣 ^{[3
]}

郭晓 ^{[3
]}

王永松 ^{[3
]}

马赫 ^{[4
]}

赵尹陬 ^{[3
]}

邬钒颖 ^{[3
]}

刘姝妤 ^{[3
]}

刘开辉 ^{[4
]}

袁亚华 ^{[3
]}

黄寒 ^{[3
]}

何军 ^{[3
]}

徐文 ^{[1
]}

刘海云 ^{[5
]}

段玉霞 ^{[3
]}

孟建桥 ^{[3
]}

机构：

[1] Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences

[2] University of Science and Technology of China

[3] School of Physics and Electronics Central South University

[4] State Key Laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum Matter,School of Physics Peking University

[5] Beijing Academy of Quantum Information Sciences

来源：

Chinese Physics B | 2022年 / 03期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

O657.37 [拉曼光谱分析法]; TQ134.11 [];

学科分类号：

070302 ; 0817 ; 081704 ;

摘要：

High-quality large 1T phase of TiX2(X = Te, Se, and S) single crystals have been grown by chemical vapor transport using iodine as a transport agent. The samples are characterized by compositional and structural analyses, and their properties are investigated by Raman spectroscopy. Several phonon modes have been observed, including the widely reported A1gand Egmodes, the rarely reported Eu mode(~183 cm-1for TiTe2, and ~185 cm-1for TiS2), and even the unexpected K mode(~85 cm-1) of TiTe2. Most phonons harden with the decrease of temperature, except that the K mode of TiTe2and the Eu and “A2u/Sh” modes of TiS2soften with the decrease of temperature. In addition, we also found phonon changes in TiSe2that may be related to charge density wave phase transition. Our results on TiX2phonons will help to understand their charge density wave and superconductivity.

引用

页码：556 / 561

页数：6

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