Two-quantum electron spin–lattice relaxation in amorphous solids

Abstract

A two-quantum process of electron spin–lattice relaxation in amorphous solids is investigated. A relaxation mechanism involving two-level tunneling systems and phonons from the region of the boson peak is considered. It is shown that this mechanism is effective under certain conditions.

Suppression of Raman electron spin relaxation of radicals in crystals. Comparison of Cu2+and free radical relaxation in triglycine sulfate and Tutton salt single crystals

“…where µ = 2-10 is a material-dependent coefficient, ω D is the Debye cutoff frequency, ω is Zeeman frequency, G is a spin-phonon coupling parameter and P is electron polarisation determining the temperature dependence of the relaxation rate. Spin relaxation via a boson peak has been used for explanation of the atypical relaxation in some globular proteins like ferrodoxin, where Raman relaxation via a boson peak was considered [51,52].…”