Pressure-induced reentrant transition in Nb S3 phases: Combined Raman scattering and x-ray diffraction study
Journal
Physical Review B
Journal Volume
99
Journal Issue
23
Pages
235126-1 - 235126-7
Date Issued
2019
Author(s)
Abdel-Hafiez, M.
Thiyagarajan, R.
Majumdar, A.
Ahuja, R.
Luo, W.
Vasiliev, A.N.
Maarouf, A.A.
Zybtsev, S.G.
Pokrovskii, V.Ya.
Zaitsev-Zotov, S.V.
Pavlovskiy, V.V.
Yang, W.
Kulik, L.V.
Abstract
We report the evolution of charge density wave states under pressure for two NbS3 phases: triclinic (phase I) and monoclinic (phase II) at room temperature. Raman and x-ray diffraction (XRD) techniques are applied. The x-ray studies on the monoclinic phase under pressure show a compression of the lattice at different rates below and above ∼7 GPa but without a change in space group symmetry. The Raman spectra of the two phases evolve similarly with pressure; all peaks almost disappear in the ∼6-8 GPa range, indicating a transition from an insulating to a metallic state, and peaks at new positions appear above 8 GPa. The results suggest suppression of the ambient charge-density waves and their subsequent recovery with new orderings above 8 GPa.
Publisher
American Physical Society
Type
journal article