Abstract
The origin of magnetoresistance in bipolar organic materials is the influence of magnetic field on the dynamics of recombination within localized electron–hole pairs. Recombination from the S spin-state of the pair is preceded by the beatings between the states S and T0. Period of the beating is set by the random hyperfine field. For the case when recombination time from S is shorter than the period, we demonstrate that a weak resonant ac drive, which couples T0 to T+ and T− affects dramatically the recombination dynamics and, thus, the current. A distinctive characteristics of the effect is that the current versus the drive amplitude exhibits a maximum.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
