Abstract
Molecules and color centers in crystals are known to exhibit a form of electron−phonon coupling, which is understandable by the Franck−Condon mechanism. In a Raman spectrum, this process is seen as a series of equidistant peaks whose relative intensities depend on the induced atomic vibration mode. The process has been predicted to be observable in crystals, but the difficulty in observing them has been related to the fact that the excited electron states tend to be delocalized. Correspondingly, it has been assumed that a self-trapping (localization) of the electron is necessary. Our polarization resonance Raman scattering data revealed two different series of Franck−Condon modes in double perovskite Sr2MnWO6 single crystals. One series corresponded to the Mn d orbital electron transition to the conduction band, whereas the second series corresponded to eg to eg transition (localized electron). The lattice distortion was estimated from the observed Franck−Condon peak positions and intensities.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
