Abstract
The thermal red-shifts of the three spectral lines E1(3P0→3F2b), E2(3P0→3F3b) and E3(3P0→3F4c) in LiYF4: Pr3+ crystals are studied by the use of a rational expression where besides the dynamic (or vibrational) effect caused by electron-phonon interaction, the static effect owing to lattice thermal expansion is also contained. It is found from the studies that the dynamic effect gives rise to the thermal red-shift, whereas the static effect leads to the thermal blue-shift. The observed thermal red-shift for the three spectral lines (or peaks) are due to the fact that the dynamic effect is greater than the static one. Even so, the static effect cannot be neglected because when the static effect is also considered, the obtained true electron-phonon coupling parameters α’ for the three spectral lines E1, E2 and E3 are about 2.25, 1.46 and 1.87 times as great as the corresponding apparent electron-phonon coupling parameters α evaluated in the previous paper by the expression including only the dynamic effect. So, the reasonable studies of thermal shift and electron-phonon coupling parameter should take both the dynamic and static effects into account.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.