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  Magnetophononics: Ultrafast spin control through the lattice

Fechner, M., Sukhov, A., Chotorlishvili, L., Kenel, C., Berakdar, J., & Spaldin, N. A. (2018). Magnetophononics: Ultrafast spin control through the lattice. Physical Review Materials, 2(6): 064401. doi:10.1103/PhysRevMaterials.2.064401.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-8C2D-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-F568-6
Genre: Journal Article

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PhysRevMaterials.2.064401.pdf (Publisher version), 3MB
 
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 Creators:
Fechner, M.1, 2, Author              
Sukhov, A.3, 4, Author
Chotorlishvili, L.3, Author
Kenel, C.2, 5, Author
Berakdar, J.3, Author
Spaldin, N. A.2, Author
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Materials Theory, ETH Zurich, ou_persistent22              
3Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, ou_persistent22              
4Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), ou_persistent22              
5Department of Materials Science and Engineering, McCormick School of Engineering, Northwestern University, ou_persistent22              

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Free keywords: Using a combination of first-principles and magnetization-dynamics calculations, we study the effect of the intense optical excitation of phonons on the magnetic behavior in insulating magnetic materials. Taking the prototypical magnetoelectric Cr2O3 as our model system, we show that excitation of a polar mode at 17 THz causes a pronounced modification of the magnetic exchange interactions through a change in the average Cr-Cr distance. In particular, the quasistatic deformation induced by nonlinear phononic coupling yields a structure with a modified magnetic state, which persists for the duration of the phonon excitation. In addition, our time-dependent magnetization dynamics computations show that systematic modulation of the magnetic exchange interaction by the phonon excitation modifies the magnetization dynamics. This temporal modulation of the magnetic exchange interaction strengths using phonons provides a route to creating nonequilibrium magnetic states and suggests avenues for fast manipulation of spin arrangements and dynamics.
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Language(s): eng - English
 Dates: 2018-02-062017-07-272018-06-04
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevMaterials.2.064401
arXiv: 1707.03216
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Project name : This work was supported financially by ETH Zurich, the ERC Advanced Grant program, Grant No. 291151 (M.F., C.K., and N.A.S.), the ERC under the European Union’s Seventh Framework Programme (FP7/2007-2013)/ ERC Grant Agree- ment No. 319286 (Q-MAC) and by the DFG through Grants No. SFB762 and No. TRR227. Calculations were performed at the Swiss National Supercomputing Centre (CSCS) under Project ID No. s624. M.F. and N.A.S. thank A. Cavalleri and T. F. Nova for useful discussions.
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Title: Physical Review Materials
  Abbreviation : Phys. Rev. Mat.
Source Genre: Journal
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Publ. Info: College Park, MD : American Physical Society
Pages: - Volume / Issue: 2 (6) Sequence Number: 064401 Start / End Page: - Identifier: ISSN: 2475-9953
CoNE: /journals/resource/2475-9953