https://doi.org/10.1140/epjp/s13360-021-01964-1
Regular Article
The influence of spin relaxation and locally strong spin exchange on magneto-spin effects in radical pairs in high magnetic fields
V. V. Voevodsky Institute of Chemical Kinetics and Combustion, SB RAS, 630090, Novosibirsk, Russia
Received:
19
April
2021
Accepted:
15
September
2021
Published online:
4
October
2021
Based on the generalized gyroscopic model of electron spin evolution of radical pair available in the literature, the recombination yield and the stationary chemically induced dynamic electron spin polarization (CIDEP) in high magnetic fields are analytically examined. The general model takes into consideration an arbitrary recombination process (both from the singlet and the triplet state), additional dephasing rates, an arbitrary magnitude exchange interaction, and both the transverse and the longitudinal spin relaxation processes. The generalized model is valid for any specific model of the system. Using the formalism of Green functions, a general approach is formulated for the calculation of the recombination yields as well as the CIDEP under the approximation of spherical symmetry and the “contact recombination.” Under these assumptions, for locally strong exchange dephasing induced by nonlocal exchange interaction of radicals an approximation for calculation of the magneto-spin effects is developed. It is shown that the longitudinal spin relaxation essentially influences the effective radius of dephasing induced by nonlocal exchange interaction of the radicals.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2021
