Charge modulation and structural transformation in TaTe2 studied by scanning tunneling microscopy/spectroscopy

被引：33
作者：
Feng, Jiagui [1 ]
Tan, Andrew [1 ]
Wagner, Sean [1 ]
Liu, Jinyu [2 ]
Mao, Zhiqiang [2 ]
Ke, Xianglin [1 ]
Zhang, Pengpeng [1 ]
机构：
[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[2] Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 02期
基金：
美国国家科学基金会;
关键词：
TRANSITION-METAL DICHALCOGENIDES; DENSITY WAVES; BAND-STRUCTURE; SUPERCONDUCTIVITY; SURFACE; IRTE2; DITELLURIDE; TEMPERATURE; STATE;
D O I：
10.1063/1.4958616
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We show that the (3 x 1) stripe structure observed in TaTe2 at room temperature arises from the formation of Ta4+-Ta4+ dimer chains along with a separate chain of Ta3+. More importantly, we reveal an intriguing lattice distortion and charge modulation at low temperature, which suggests an interplay and competition between the triple-axis (3 x 3) charge density wave-like modulation and the single-axis (3 x 1) stripe configuration. This work highlights the importance of TaTe2 as an alternative platform with rich structural and electrical phases to explore charge-lattice coupling. Published by AIP Publishing.
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页数：5
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