Phonon-induced relaxation of a two-state system in solids

Jaroslav Albert, E. M. Chudnovsky, D. A. Garanin
2006 Physical Review B  
We study phonon-induced relaxation of quantum states of a particle (e.g., electron or proton) in a rigid double-well potential in a solid. Relaxation rate due to Raman two-phonon processes have been computed. We show that in a two-state limit, symmetry arguments allow one to express these rates in terms of independently measurable parameters. In general, the two-phonon processes dominate relaxation at higher temperature. Due to parity effect in a biased two-state system, their rate can be
more » ... r rate can be controlled by the bias.
doi:10.1103/physrevb.74.115102 fatcat:5rajbw67jzc5rdbayuxrpomrpy