The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2022
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| Materias: | |
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| author | Lojewski, Tobias Elhanoty, Mohamed F. Guyader, Loïc Le Grånäs, Oscar Agarwal, Naman Boeglin, Christine Carley, Robert Castoldi, Andrea David, Christian Deiter, Carsten Döring, Florian Engel, Robin Y. Erdinger, Florian Fangohr, Hans Fiorini, Carlo Fischer, Peter Gerasimova, Natalia Gort, Rafael de Groot, Frank Hansen, Karsten Hauf, Steffen Hickin, David Izquierdo, Manuel Van Kuiken, Benjamin E. Kvashnin, Yaroslav Lambert, Charles-Henri Lomidze, David Maffessanti, Stefano Mercadier, Laurent Mercurio, Giuseppe Miedema, Piter S. Ollefs, Katharina Pace, Matthias Porro, Matteo Rezvani, Javad Rösner, Benedikt Rothenbach, Nico Samartsev, Andrey Scherz, Andreas Schlappa, Justina Stamm, Christian Teichmann, Martin Thunstrom, Patrik Turcato, Monica Yaroslavtsev, Alexander Zhu, Jun Beye, Martin Wende, Heiko Bovensiepen, Uwe Eriksson, Olle Eschenlohr, Andrea |
| author_facet | Lojewski, Tobias Elhanoty, Mohamed F. Guyader, Loïc Le Grånäs, Oscar Agarwal, Naman Boeglin, Christine Carley, Robert Castoldi, Andrea David, Christian Deiter, Carsten Döring, Florian Engel, Robin Y. Erdinger, Florian Fangohr, Hans Fiorini, Carlo Fischer, Peter Gerasimova, Natalia Gort, Rafael de Groot, Frank Hansen, Karsten Hauf, Steffen Hickin, David Izquierdo, Manuel Van Kuiken, Benjamin E. Kvashnin, Yaroslav Lambert, Charles-Henri Lomidze, David Maffessanti, Stefano Mercadier, Laurent Mercurio, Giuseppe Miedema, Piter S. Ollefs, Katharina Pace, Matthias Porro, Matteo Rezvani, Javad Rösner, Benedikt Rothenbach, Nico Samartsev, Andrey Scherz, Andreas Schlappa, Justina Stamm, Christian Teichmann, Martin Thunstrom, Patrik Turcato, Monica Yaroslavtsev, Alexander Zhu, Jun Beye, Martin Wende, Heiko Bovensiepen, Uwe Eriksson, Olle Eschenlohr, Andrea |
| contents | The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb repulsion. The interplay between the respective terms of the Hamiltonian is of fundamental interest, since it produces most, if not all, of the exotic phenomena observed in the solid state. By combining high energy and temporal resolution in femtosecond time-resolved X-ray absorption spectroscopy with ab initio time-dependent density functional theory we analyze the electronic structure in fcc Ni on the time scale of these interactions in a pump-probe experiment. We distinguish transient broadening and energy shifts in the absorption spectra, which we demonstrate to be caused by electron repopulation and correlation-induced modifications of the electronic structure, respectively. Importantly, the theoretical description of this experimental result hence requires to take the local Coulomb interaction into account, revealing a temporal interplay between band formation, exchange interaction, and Coulomb repulsion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_13162 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni Lojewski, Tobias Elhanoty, Mohamed F. Guyader, Loïc Le Grånäs, Oscar Agarwal, Naman Boeglin, Christine Carley, Robert Castoldi, Andrea David, Christian Deiter, Carsten Döring, Florian Engel, Robin Y. Erdinger, Florian Fangohr, Hans Fiorini, Carlo Fischer, Peter Gerasimova, Natalia Gort, Rafael de Groot, Frank Hansen, Karsten Hauf, Steffen Hickin, David Izquierdo, Manuel Van Kuiken, Benjamin E. Kvashnin, Yaroslav Lambert, Charles-Henri Lomidze, David Maffessanti, Stefano Mercadier, Laurent Mercurio, Giuseppe Miedema, Piter S. Ollefs, Katharina Pace, Matthias Porro, Matteo Rezvani, Javad Rösner, Benedikt Rothenbach, Nico Samartsev, Andrey Scherz, Andreas Schlappa, Justina Stamm, Christian Teichmann, Martin Thunstrom, Patrik Turcato, Monica Yaroslavtsev, Alexander Zhu, Jun Beye, Martin Wende, Heiko Bovensiepen, Uwe Eriksson, Olle Eschenlohr, Andrea Materials Science The complex electronic structure of metallic ferromagnets is determined by a balance between exchange interaction, electron hopping leading to band formation, and local Coulomb repulsion. The interplay between the respective terms of the Hamiltonian is of fundamental interest, since it produces most, if not all, of the exotic phenomena observed in the solid state. By combining high energy and temporal resolution in femtosecond time-resolved X-ray absorption spectroscopy with ab initio time-dependent density functional theory we analyze the electronic structure in fcc Ni on the time scale of these interactions in a pump-probe experiment. We distinguish transient broadening and energy shifts in the absorption spectra, which we demonstrate to be caused by electron repopulation and correlation-induced modifications of the electronic structure, respectively. Importantly, the theoretical description of this experimental result hence requires to take the local Coulomb interaction into account, revealing a temporal interplay between band formation, exchange interaction, and Coulomb repulsion. |
| title | The interplay of local electron correlations and ultrafast spin dynamics in fcc Ni |
| topic | Materials Science |
| url | https://arxiv.org/abs/2210.13162 |