Competing spin transfer and dissipation at Co/Cu(001) interfaces on femtosecond 
timescales

Chen, J.; Bovensiepen, U.; Eschenlohr, A.; Müller, T.; Elliott, P.; Gross, E. K. U.; Dewhurst, J. K.; Sharma, S.

doi:10.1103/PhysRevLett.122.067202

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Competing spin transfer and dissipation at Co/Cu(001) interfaces on femtosecond timescales

MPS-Authors

Müller, T.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Elliott, P.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Gross, E. K. U.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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Dewhurst, J. K.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Sharma, S.
Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1103/PhysRevLett.122.067202
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Citation

Chen, J., Bovensiepen, U., Eschenlohr, A., Müller, T., Elliott, P., Gross, E. K. U., et al. (2019). Competing spin transfer and dissipation at Co/Cu(001) interfaces on femtosecond timescales. Physical Review Letters, 122(6): 067202. doi:10.1103/PhysRevLett.122.067202.

Cite as: https://hdl.handle.net/21.11116/0000-0009-1242-8

Abstract

By combining interface-sensitive nonlinear magneto-optical experiments with femtosecond time resolution and ab initio time-dependent density functional theory, we show that optically excited spin dynamics at Co/Cu(001) interfaces proceeds via spin-dependent charge transfer and back transfer between Co and Cu. This ultrafast spin transfer competes with dissipation of spin angular momentum mediated by spin-orbit coupling already on sub 100 fs timescales. We thereby identify the fundamental microscopic processes during laser-induced spin transfer at a model interface for technologically relevant ferromagnetic heterostructures.