This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevMaterials.2.064401 in citations.
Please use the identifier: http://hdl.handle.net/2128/19668 in citations.
Magnetophononics: Ultrafast spin control through the lattice
Magnetophononics: Ultrafast spin control through the lattice
Using a combination of first-principles and magnetization-dynamics calculations, we study the effect of theintense optical excitation of phonons on the magnetic behavior in insulating magnetic materials. Taking theprototypical magnetoelectric Cr2O3 as our model system, we show that excitation of a p...
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Personal Name(s): | Fechner, Michael (Corresponding author) |
---|---|
Sukhov, Alexander / Chotorlishvili, Levan / Kenel, Christoph / Berakdar, Jamal / Spaldin, Nicola | |
Contributing Institute: |
Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: | Physical review materials, 2 (2018) S. 064401 |
Imprint: |
College Park, MD
APS
2018
|
DOI: |
10.1103/PhysRevMaterials.2.064401 |
Document Type: |
Journal Article |
Research Program: |
Solar cells of the next generation |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/19668 in citations.
Using a combination of first-principles and magnetization-dynamics calculations, we study the effect of theintense optical excitation of phonons on the magnetic behavior in insulating magnetic materials. Taking theprototypical magnetoelectric Cr2O3 as our model system, we show that excitation of a polar mode at 17 THzcauses a pronounced modification of the magnetic exchange interactions through a change in the average Cr-Crdistance. In particular, the quasistatic deformation induced by nonlinear phononic coupling yields a structure witha modified magnetic state, which persists for the duration of the phonon excitation. In addition, our time-dependentmagnetization dynamics computations show that systematic modulation of the magnetic exchange interaction bythe phonon excitation modifies the magnetization dynamics. This temporal modulation of the magnetic exchangeinteraction strengths using phonons provides a route to creating nonequilibrium magnetic states and suggestsavenues for fast manipulation of spin arrangements and dynamics. |