Quantum dynamics of nuclear spins and spin relaxation in organic semiconductors

We investigate the role of the nuclear-spin quantum dynamics in hyperfine-induced spin relaxation of hopping carriers in organic semiconductors. The fast-hopping regime, when the carrier spin does not rotate much between subsequent hops, is typical for organic semiconductors possessing long spin coherence times. We consider this regime and...

Polaron spin echo envelope modulations in an organic semiconducting polymer

We present a theoretical analysis of the electron spin echo envelope modulation (ESEEM) spectra of polarons in semiconducting π-conjugated polymers. We show that the contact hyperfine coupling and the dipolar interaction between the polaron and the proton spins give rise to different features in the ESEEM spectra. Our theory enables direct...