TY  - JOUR
AU  - Feng, Shiyu
AU  - Sun, Baihong
AU  - Lu, Wenting
AU  - Zou, Haikai
AU  - Wei, Chenxin
AU  - Zhang, Qian
AU  - Wang, Bihan
AU  - Kunz, Martin
AU  - Kadobayashi, Hirokazu
AU  - Ahmad, Azkar Saeed
AU  - Koren, Elad
AU  - Stavrou, Elissaios
TI  - High pressure structural and lattice dynamics study of α-In<sub>2</sub>Se<sub>3</sub>
JO  - The journal of chemical physics
VL  - 162
IS  - 23
SN  - 0021-9606
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PUBDB-2025-03826
SP  - 234505
PY  - 2025
AB  - Layered α-In<sub>2</sub>Se<sub>3</sub> has been studied using a combined in situ synchrotron angle-dispersive powder x-ray diffraction and Raman spectroscopy study in a diamond anvil cell up to 60+ GPa, at room temperature. Helium, which remains fairly hydrostatic up to the highest pressure in this study, was used as the pressure-transmitting medium. The results from both experimental methods reveal a pressure-induced structural phase transition from α-In<sub>2</sub>Se<sub>3</sub> to a monoclinic β′-In<sub>2</sub>Se<sub>3</sub> structure at ≈1 GPa, in agreement with previous studies. Based on our detailed measurements using both experimental techniques and the F–f formalism, the β′-In<sub>2</sub>Se<sub>3</sub> structure remains stable up to 45 GPa, without a clear indication of a phase transition toward the previously reported β-In<sub>2</sub>Se<sub>3</sub> phase. Above this pressure, <sub>2</sub>Se<sub>3</sub> adopts a disordered solid-solution-like orthorhombic structure, phase IV. The results are discussed in comparison with the relevant previous studies of α-In<sub>2</sub>Se<sub>3</sub> under pressure.   
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1063/5.0266372
UR  - https://bib-pubdb1.desy.de/record/637334
ER  -