Zhong, C.; Mai, D.; Li, X.; Wang, J.; Dai, R.; Wang, Z.; Sun, X.; Zhang, Z. Structural Stability of γ-Boron under High Pressure up to 126 GPa with Fine Pressure Increments. Symmetry2023, 15, 1308.
Zhong, C.; Mai, D.; Li, X.; Wang, J.; Dai, R.; Wang, Z.; Sun, X.; Zhang, Z. Structural Stability of γ-Boron under High Pressure up to 126 GPa with Fine Pressure Increments. Symmetry 2023, 15, 1308.
Zhong, C.; Mai, D.; Li, X.; Wang, J.; Dai, R.; Wang, Z.; Sun, X.; Zhang, Z. Structural Stability of γ-Boron under High Pressure up to 126 GPa with Fine Pressure Increments. Symmetry2023, 15, 1308.
Zhong, C.; Mai, D.; Li, X.; Wang, J.; Dai, R.; Wang, Z.; Sun, X.; Zhang, Z. Structural Stability of γ-Boron under High Pressure up to 126 GPa with Fine Pressure Increments. Symmetry 2023, 15, 1308.
Abstract
The structural stability of γ-boron is investigated using Raman spectra under high pressures up to 126 GPa at ambient temperature. The pressure dependence of all the Raman-active modes of the γ-boron is reported. We also observe amusing changes within the B3g and B1g Raman-active vibrational modes, which results in the phenomenon of merging first and then separating of the Raman peaks. In addition to the Raman measurements, the changes in crystal structure and force constants are calculated to reasonably explain the discrepancy between the two Raman modes in response to pressure. The results of the continuous shifts for all Raman modes with increasing pressure indicate that γ-boron remains stable below this pressure value, with no changes in either symmetry or structure.
Keywords
diamond anvil cell; γ-boron; high pressure; structural stability; internal coordinates; force constants
Subject
Physical Sciences, Condensed Matter Physics
Copyright:
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