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- W2913426212 abstract "High pressure Raman spectroscopy studies on 1T-TiSe2 were carried out up to ~20.5 GPa. Based on the anomalies in phonon linewidth (lifetime) and phonon frequency of A 1g mode, we observe three transitions at ~2.5 GPa, ~6.0 GPa and ~15 GPa. The transitions at ~2.5 and ~6.0 GPa are the two topological phase transitions consistent with the theoretical prediction by Zhu et al in 1T-TiSe2 under pressure, namely, a topological trivial to non-trivial transition (Z 2 = 1) and topological non-trivial to trivial transition (Z 2 = 0). The trigonal (1T) phase of TiSe2 is stable up to ~15 GPa beyond which it undergoes structural transition as seen from the appearance of new Raman modes. There is a coexistence of the 1T and the new high-pressure phase up to ~19 GPa. The structural transition is completely reversible as seen from the appearance of 1T phase Raman spectra upon release of the pressure." @default.
- W2913426212 created "2019-02-21" @default.
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- W2913426212 date "2019-02-22" @default.
- W2913426212 modified "2023-09-26" @default.
- W2913426212 title "Pressure induced topological and structural phase transitions in 1T-TiSe<sub>2</sub>: a Raman study" @default.
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- W2913426212 doi "https://doi.org/10.1088/1361-648x/ab01bb" @default.
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