Suppression of the Charge Density Wave State in Two-Dimensional 1T -TiSe2 by Atmospheric Oxidation
| Autor: | Jinghui Wang, Liying Jiao, Lifei Sun, Kai Rossnagel, Qinghua Zhang, Chuanhui Chen, Chenggang Tao, Lin Gu, Guanchen Xu, Tianqi Zhao, C. Sohrt, Dong Wang |
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| Rok vydání: | 2017 |
| Předmět: |
Superconductivity
Passivation Chemistry Nanotechnology General Medicine 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Metal Chemical physics visual_art visual_art.visual_art_medium Oxidation process 0210 nano-technology Charge density wave |
| Zdroj: | Angewandte Chemie International Edition. 56:8981-8985 |
| ISSN: | 1433-7851 |
| Popis: | Two-dimensional (2D) metallic transition-metal dichalcogenides (TMDCs), such as 1T-TiSe2 , have recently emerged as unique platforms for exploring their exciting properties of superconductivity and the charge density wave (CDW). 2D 1T-TiSe2 undergoes rapid oxidation under ambient conditions, significantly affecting its CDW phase-transition behavior. We comprehensively investigate the oxidation process of 2D TiSe2 by tracking the evolution of the chemical composition and atomic structure with various microscopic and spectroscopic techniques and reveal its unique selenium-assisting oxidation mechanism. Our findings facilitate a better understanding of the chemistry of ultrathin TMDCs crystals, introduce an effective method to passivate their surfaces with capping layers, and thus open a way to further explore the functionality of these materials toward devices. |
| Databáze: | OpenAIRE |
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