2019/02/11 by F. Meggle, M. Viret, J. Kreisel +1
Engineering · Materials Science · Physics and Astronomy · #Absorption (acoustics) #Coupling (piping) #Exciton #Ferroelectric and Piezoelectric Materials #Ferromagnetism #Kerr effect #Lattice (music) #Magneto-Optical Properties and Applications #Multiferroics #Multiferroics and related materials #Mössbauer effect #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.5081038
published as Journal of Applied Physics 125, 114104 (2019) · 7 pages, 6 figures
arxiv created 2019/02/11 · openalex publication_date 2019/03/19 · arxiv updated 2019/03/26 · openalex created_date 2019/04/01 · openalex updated_date 2026/08/05
We studied the light-induced effects in BiFeO3 single crystals as a function of temperature by means of optical spectroscopy. Here, we report the observation of several light-induced absorption features, which are discussed in terms of the photostriction effect and are interpreted in terms of excitons. The temperature dependence of their energy position suggests a possible coupling between the excitons and the lattice vibrations. Moreover, there are hints for anomalies in the temperature evolution of the excitonic features, which might be related to the temperature-induced magnetic phase transitions in BiFeO3. Our findings suggest a coupling between light-induced excitons and the lattice and spin degrees of freedom, which might be relevant for the observed ultrafast photostriction effect in multiferroic BiFeO3.