Please use this identifier to cite or link to this item:
|Title:||Contrast and Raman spectroscopy study of single-and few-layered charge density wave material: 2H-TaSe2|
|Citation:||Hajiyev, P., Cong, C., Qiu, C., Yu, T. (2013). Contrast and Raman spectroscopy study of single-and few-layered charge density wave material: 2H-TaSe2. Scientific Reports 3 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/srep02593|
|Abstract:||In this article, we report the first successful preparation of single- and few-layers of tantalum diselenide (2H-TaSe2) by mechanical exfoliation technique. Number of layers is confirmed by white light contrast spectroscopy and atomic force microscopy (AFM). Vibrational properties of the atomically thin layers of 2H-TaSe2 are characterized by micro-Raman spectroscopy. Room temperature Raman measurements demonstrate MoS 2-like spectral features, which are reliable for thickness determination. E 1g mode, usually forbidden in backscattering Raman configuration is observed in the supported TaSe2 layers while disappears in the suspended layers, suggesting that this mode may be enabled because of the symmetry breaking induced by the interaction with the substrate. A systematic in-situ low temperature Raman study, for the first time, reveals the existence of incommensurate charge density wave phase transition in single and double-layered 2H-TaSe2 as reflected by a sudden softening of the second-order broad Raman mode resulted from the strong electron-phonon coupling (Kohn anomaly).|
|Source Title:||Scientific Reports|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 20, 2018
WEB OF SCIENCETM
checked on Sep 4, 2018
checked on Aug 3, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.