Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6029
Title: Unusual lattice vibration characteristics in whiskers of the pseudo-one-dimensional titanium trisulfide TiS3
Authors: Wu, Kedi
Torun, Engin
Şahin, Hasan
Chen, Bin
Fan, Xi
Pant, Anupum
Wright, David Parsons
Aoki, Toshihiro
Peeters, François M.
Soignard, Emmanuel
Tongay, Sefaattin
Keywords: Titanium trisulfide
Anisotropy
Oscillations
Vibrissa
Whisker
Raman spectroscopy
Issue Date: 22-Sep-2016
Publisher: Nature Publishing Group
Source: Wu, K., Torun, E., Şahin, H., Chen, B., Fan, X., Pant, A.,...Tongay, S. (2016). Unusual lattice vibration characteristics in whiskers of the pseudo-one-dimensional titanium trisulfide TiS3. Nature Communications, 7. doi:10.1038/ncomms12952
Abstract: Transition metal trichalcogenides form a class of layered materials with strong in-plane anisotropy. For example, titanium trisulfide (TiS3) whiskers are made out of weakly interacting TiS3 layers, where each layer is made of weakly interacting quasi-one-dimensional chains extending along the b axis. Here we establish the unusual vibrational properties of TiS3 both experimentally and theoretically. Unlike other two-dimensional systems, the Raman active peaks of TiS3 have only out-of-plane vibrational modes, and interestingly some of these vibrations involve unique rigid-chain vibrations and S-S molecular oscillations. High-pressure Raman studies further reveal that the Ag S-S S-S molecular mode has an unconventional negative pressure dependence, whereas other peaks stiffen as anticipated. Various vibrational modes are doubly degenerate at ambient pressure, but the degeneracy is lifted at high pressures. These results establish the unusual vibrational properties of TiS3 with strong in-plane anisotropy, and may have relevance to understanding of vibrational properties in other anisotropic two-dimensional material systems. © The Author(s) 2016.
URI: http://doi.org/10.1038/ncomms12952
http://hdl.handle.net/11147/6029
ISSN: 2041-1723
2041-1723
Appears in Collections:Photonics / Fotonik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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