6533b7d8fe1ef96bd126b81a
RESEARCH PRODUCT
Ultrafast dynamics of indirect exchange interaction and transient spin current generation in a two-dimensional electron gas
V. I. LitvinovVladimir A. StephanovichJamal BerakdarVitalii K. Dugaevsubject
Physics0103 physical sciencesDynamics (mechanics)02 engineering and technologyTransient (oscillation)Atomic physicsSpin current021001 nanoscience & nanotechnology010306 general physics0210 nano-technology01 natural sciencesUltrashort pulseIndirect exchangedescription
We predict that a driven localized magnetic moment coupled to mobile carriers of a metal or semiconductor surface or interface generates a specific dynamics of the carrier spin density as well as a transient spin current. Numerical results illustrate the time-dependent Friedel oscillations and the associated ultrafast Ruderman-Kittel- Kasuya-Yosida (RKKY) interaction as well as the spin current generated by the impurity spin flipping. Retardation effects of the indirect exchange interaction of the impurity spins via the conduction electrons are found and discussed. Our results point to an alternative way of controlling the local magnetization on a subpicosecond time scale via appropriate tuning of the external fields that drive the magnetic dynamics of a localized moment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-24 | Physical Review B |