Magnetic field dependence of triplet-singlet relaxation in quantum dots with spin-orbit coupling

Juan I. Climente, Andrea Bertoni, Guido Goldoni, Massimo Rontani, Elisa Molinari
2007 Physical Review B  
We estimate the triplet-singlet relaxation rate due to spin-orbit coupling assisted by phonon emission in weakly-confined quantum dots. Our results for two and four electrons show that the different triplet-singlet relaxation trends observed in recent experiments under magnetic fields can be understood within a unified theoretical description, as the result of the competition between spin-orbit coupling and phonon emission efficiency. Moreover, we show that both effects are greatly affected by
more » ... reatly affected by the strength of the confinement and the external magnetic field, which may give access to very long-lived triplet states as well as to selective population of the triplet Zeeman sublevels.
doi:10.1103/physrevb.75.081303 fatcat:ptvv5oa345fk7npdo4rzfhenna