Correlations drive the attosecond response of strongly-correlated insulators
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915131415330816 |
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| author | Cazali, Romain Alic, Amina Guer, Matthieu Kaplan, Christopher J. Lepetit, Fabien Tcherbakoff, Olivier Guizard, Stéphane Rubio, Angel Tancogne-Dejean, Nicolas Chiuzbăian, Gheorghe S. Géneaux, Romain |
| author_facet | Cazali, Romain Alic, Amina Guer, Matthieu Kaplan, Christopher J. Lepetit, Fabien Tcherbakoff, Olivier Guizard, Stéphane Rubio, Angel Tancogne-Dejean, Nicolas Chiuzbăian, Gheorghe S. Géneaux, Romain |
| contents | Attosecond spectroscopy of materials has provided invaluable insight into light-driven coherent electron dynamics. However, attosecond spectroscopies have so far been focused on weakly-correlated materials. As a result, the behavior of strongly-correlated systems is largely unknown at sub- to few-femtosecond timescales, even though it is typically the realm at which electron-electron interactions operate. Here we conduct attosecond-resolved experiments on the correlated insulator nickel oxide, and compare its response to a common band insulator, revealing fundamentally different behaviors. The results, together with state-of-the art time-dependent $\textit{ab initio}$ calculations, show that the correlated system response is governed by a laser-driven quench of electron correlations. The evolution of the on-site electronic interaction is measured here at its natural timescale, marking the first direct measurement of Hubbard $U$ renormalization in NiO. It is found to take place within a few femtoseconds, after which structural changes slowly start to take place. The resulting picture sheds light on the entire light-induced response of a strongly-correlated system, from attosecond to long-lived effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_19238 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Correlations drive the attosecond response of strongly-correlated insulators Cazali, Romain Alic, Amina Guer, Matthieu Kaplan, Christopher J. Lepetit, Fabien Tcherbakoff, Olivier Guizard, Stéphane Rubio, Angel Tancogne-Dejean, Nicolas Chiuzbăian, Gheorghe S. Géneaux, Romain Strongly Correlated Electrons Materials Science Attosecond spectroscopy of materials has provided invaluable insight into light-driven coherent electron dynamics. However, attosecond spectroscopies have so far been focused on weakly-correlated materials. As a result, the behavior of strongly-correlated systems is largely unknown at sub- to few-femtosecond timescales, even though it is typically the realm at which electron-electron interactions operate. Here we conduct attosecond-resolved experiments on the correlated insulator nickel oxide, and compare its response to a common band insulator, revealing fundamentally different behaviors. The results, together with state-of-the art time-dependent $\textit{ab initio}$ calculations, show that the correlated system response is governed by a laser-driven quench of electron correlations. The evolution of the on-site electronic interaction is measured here at its natural timescale, marking the first direct measurement of Hubbard $U$ renormalization in NiO. It is found to take place within a few femtoseconds, after which structural changes slowly start to take place. The resulting picture sheds light on the entire light-induced response of a strongly-correlated system, from attosecond to long-lived effects. |
| title | Correlations drive the attosecond response of strongly-correlated insulators |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2501.19238 |