Controlled Synthesis of Atomically Thin 1T-TaS2 for Tunable Charge Density Wave Phase Transitions

Wei Fu, Yu Chen, Junhao Lin, Xuewen Wang, Qingsheng Zeng, Jiadong Zhou, Lu Zheng, Hong Wang, Yongmin He, Haiyong He, Qundong Fu, Kazutomo Suenaga, Ting Yu, Zheng Liu

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

The charge density wave (CDW) in two-dimensional (2D) materials is attracting substantial interest because of its magnificent many-body collective phenomena. Various CDW phases have been observed in several 2D materials before they reach the phase of superconductivity. However, to date, the atomically thin CDW materials were mainly fabricated by mechanically exfoliating from their bulk counterparts, which leads to low production yield and small sample sizes. Here, we report the controlled synthesis of atomically thin 1T-TaS2, a typical CDW material, by a chemical vapor deposition (CVD) method. The high quality of as-grown 1T-TaS2 has been confirmed by complementary characterization technologies. Moreover, the thickness-dependent CDW phase transitions have been revealed in these ultrathin flakes by temperature-dependent Raman spectra. This work opens up a new window for the large-scale synthesis of ultrathin CDW materials and sheds light on the fabrication of next-generation electronic devices.

Original languageEnglish
Pages (from-to)7613-7618
Number of pages6
JournalChemistry of Materials
Volume28
Issue number21
DOIs
StatePublished - 8 Nov 2016
Externally publishedYes

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