Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics.However,sub-femtosecond spin dynamics have not yet been observed or predicted.Here,we explore ultrafast...Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics.However,sub-femtosecond spin dynamics have not yet been observed or predicted.Here,we explore ultrafast light-driven spin dynamics in a highly nonresonant strong-field regime.Through state-of-the-art ab initio calculations,we predict that a nonmagnetic material can transiently transform into a magnetic one via dynamical extremely nonlinear spin-flipping processes,which occur on attosecond timescales and are mediated by cascaded multi-photon and spin–orbit interactions.These are nonperturbative nonresonant analogs to the inverse Faraday effect,allowing the magnetization to evolve in very high harmonics of the laser frequency(e.g.here up to the 42nd,oscillating at~100 attoseconds),and providing control over the speed of magnetization by tuning the laser power and wavelength.Remarkably,we show that even for linearly polarized driving,where one does not intuitively expect the onset of an induced magnetization,the magnetization transiently oscillates as the system interacts with light.This response is enabled by transverse light-driven currents in the solid,and typically occurs on timescales of~500 attoseconds(with the slower femtosecond response suppressed).An experimental setup capable of measuring these dynamics through pump–probe transient absorption spectroscopy is simulated.Our results pave the way for attosecond regimes of manipulation of magnetism.展开更多
High-harmonic generation(HHG)has emerged as a central technique in attosecond science and strong-field physics,providing a tool for investigating ultrafast dynamics.However,the microscopic mechanism of HHG in solids i...High-harmonic generation(HHG)has emerged as a central technique in attosecond science and strong-field physics,providing a tool for investigating ultrafast dynamics.However,the microscopic mechanism of HHG in solids is still under debate,and it is unclear how it is modified in the ubiquitous presence of phonons.展开更多
Correction to:npj Computational Materials https://doi.org/10.1038/s41524-024-01399-z,published online 02 September 2024 In this article,there are typos that need to be corrected.The main corrections are below.The orig...Correction to:npj Computational Materials https://doi.org/10.1038/s41524-024-01399-z,published online 02 September 2024 In this article,there are typos that need to be corrected.The main corrections are below.The original article has been corrected.展开更多
基金This work was supported by the Cluster of Excellence Advanced Imaging of Matter(AIM),Grupos Consolidados(IT1249-19),SFB925“Light induced dynamics and control of correlated quantum systems”and has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No.860553.The Flatiron Institute is a division of the Simons Foundation.O.N.gratefully acknowledges the generous support of a Schmidt Science Fellowship。
文摘Irradiating solids with ultrashort laser pulses is known to initiate femtosecond timescale magnetization dynamics.However,sub-femtosecond spin dynamics have not yet been observed or predicted.Here,we explore ultrafast light-driven spin dynamics in a highly nonresonant strong-field regime.Through state-of-the-art ab initio calculations,we predict that a nonmagnetic material can transiently transform into a magnetic one via dynamical extremely nonlinear spin-flipping processes,which occur on attosecond timescales and are mediated by cascaded multi-photon and spin–orbit interactions.These are nonperturbative nonresonant analogs to the inverse Faraday effect,allowing the magnetization to evolve in very high harmonics of the laser frequency(e.g.here up to the 42nd,oscillating at~100 attoseconds),and providing control over the speed of magnetization by tuning the laser power and wavelength.Remarkably,we show that even for linearly polarized driving,where one does not intuitively expect the onset of an induced magnetization,the magnetization transiently oscillates as the system interacts with light.This response is enabled by transverse light-driven currents in the solid,and typically occurs on timescales of~500 attoseconds(with the slower femtosecond response suppressed).An experimental setup capable of measuring these dynamics through pump–probe transient absorption spectroscopy is simulated.Our results pave the way for attosecond regimes of manipulation of magnetism.
基金supported by the Cluster of Excellence Advanced Imaging of Matter(AIM),Grupos Consolidados(IT1249-19)and SFB925J.Z.acknowledges funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No.886291(PeSD-NeSL)+1 种基金O.N.and I.L.gratefully acknowledge the support of the Humboldt foundationO.N.gratefully acknowledges the support of a Schmidt Science Fellowship.
文摘High-harmonic generation(HHG)has emerged as a central technique in attosecond science and strong-field physics,providing a tool for investigating ultrafast dynamics.However,the microscopic mechanism of HHG in solids is still under debate,and it is unclear how it is modified in the ubiquitous presence of phonons.
文摘Correction to:npj Computational Materials https://doi.org/10.1038/s41524-024-01399-z,published online 02 September 2024 In this article,there are typos that need to be corrected.The main corrections are below.The original article has been corrected.
