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arXiv · 1906.08921

Fluctuating exchange interactions enable quintet multiexciton formation in singlet fission

Miles I. Collins·Dane R. McCamey·Murad J. Y. Tayebjee
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Abstract

Several recent electron spin resonance studies have observed a quintet multiexciton state during the singlet fission process. Here we provide a general theoretical explanation for the generation of this state by invoking a time-varying exchange coupling between pairs of triplet excitons, and subsequently solving the relevant time-varying spin Hamiltonian for a range of transition times. We simulate experimental ESR spectra and draw qualitative conclusions about the adiabatic/diabatic transition between triplet pair spin states.

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Miles I. Collins, Dane R. McCamey, Murad J. Y. Tayebjee. 2019-06-21. Fluctuating exchange interactions enable quintet multiexciton formation in singlet fission. https://doi.org/10.1063/1.5115816

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