Exciton dynamics and energy transfers in pure CsMnF3
نویسندگان
چکیده
2014 We report the spectral and time characteristics of the fluorescence of CsMnF3. The weak intrinsic fluorescence in nominally pure samples is analysed with time resolved techniques showing the energy transfer processes from exciton to fluorescing traps. By applying either a uniaxial stress along the Mn2-Mn1 direction or a high magnetic field in the basal plane we are able to monitor the efficiency of this energy transfer. Moreover a non linear exciton decay channel is observed for exciton densities up to 1018 cm-3. Assuming an exciton-exciton interaction mechanism, the collision parameter PB is used to estimate an effective diffusion coefficient
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تاریخ انتشار 2016