Charge Instability in Single-Layer TiTe2 Mediated by van der Waals Bonding to Substrates

Meng Kai Lin, Joseph A. Hlevyack, Peng Chen, Ro Ya Liu, Sung Kwan Mo, T. C. Chiang

研究成果: 雜誌貢獻期刊論文同行評審

7 引文 斯高帕斯(Scopus)

摘要

Single layers of transition metal dichalcogenides are of interest for emergent properties; an often-neglected issue is substrate effects. Our experiments show that the charge density wave in a single-layer TiTe2 grown on PtTe2 films is strongly suppressed by increasing the PtTe2 substrate thickness. Given that the interfacial bonding remains of the weak incommensurate van der Waals type, the observed changes are correlated with a thickness-dependent metallicity transformation in the PtTe2 substrate. The results illustrate the crucial role of the substrate in single-layer physics.

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文章編號176405
期刊Physical Review Letters
125
發行號17
DOIs
出版狀態已出版 - 10月 2020

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