2011/02/23 by Carlo Marini, Marini, Carlo, Daniele Chermisi +11
Earth and Planetary Sciences · Materials Science · #Crystal Structures and Properties #FOS: Physical sciences #High-pressure geophysics and materials #Materials Science (cond-mat.mtrl-sci) #Solid-state spectroscopy and crystallography
paper · pdf · doi:10.48550/arxiv.1102.4775
openalex publication_date 2011/02/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A study of high pressure solid Te was carried out at room temperature using Raman spectroscopy and Density Functional Theory (DFT) calculations. The analysis of the P-dependence of the experi- mental phonon spectrum reveals the occurrence of phase transitions at 4 GPa and 8 GPa confirming the high-pressure scenario recently proposed. The effects of the incommensurate lattice modulation on the vibrational properties of Te is discussed. DFT calculations agree with present and previous experimental data and show the metallization process at 4 GPa being due to the development of charge-bridges between atoms belonging to adjacent chains. A first-principles study of the stability of the 4 GPa phase is reported and discussed also in the light of the insurgence of lattice modulation.