2019/10/11 by F. Meggle, J. Ebad-Allah, J. Kreisel +1 · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Engineering physics #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Geophysics and Sensor Technology #High pressure #Materials science #Multiferroics #Multiferroics and related materials #Nuclear magnetic resonance #Optoelectronics #Physics #Spectroscopy #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.5125741
published in Journal of Applied Physics 126(16) (American Institute of Physics) · 7 pages, 7 figures; accepted for publication in the Journal of Applied Physics
arxiv created 2019/10/11 · openalex publication_date 2019/10/28 · arxiv updated 2019/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The pressure dependence of light-induced effects in single-crystalline BiFeO3 is studied by optical spectroscopy. At low pressures, we observe three light-induced absorption features with energies just below the two crystal-field excitations and the absorption onset, respectively. These absorption features were previously ascribed to excitons, possibly connected with the ultrafast photostriction effect in BiFeO3. The pressure-induced redshift of the absorption features follows the pressure dependence of the corresponding crystal-field excitations and absorption onset, suggesting the link between them. Above the structural phase transition at Pc1≈3.5GPa, the three absorption features disappear, suggesting their connection to the polar phase in BiFeO3. The pressure-induced disappearance of the photoinduced features is irreversible upon pressure release.