Spin-orbit coupling induced ultrahigh-harmonic generation from magnetic dynamics

Ly, Ousmane; Manchon, Aurélien

doi:10.1103/physrevb.105.l180415

Cited by 7 publications

(30 citation statements)

References 35 publications

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“…Some aspects of the scaling laws underlying the effect have been presented in ref. [12]. * ousmane.ly@kaust.edu.sa Recently, two studies [13,14] have appeared, where mainly the claimed scaling up of the number of the harmonics was criticized, and the ultrahigh harmonic regime underlying ref.…”

Section: Introductionmentioning

confidence: 99%

“…* ousmane.ly@kaust.edu.sa Recently, two studies [13,14] have appeared, where mainly the claimed scaling up of the number of the harmonics was criticized, and the ultrahigh harmonic regime underlying ref. [12] was deemed to be a result of numerical bugs.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In [14], few reasons have been deemed responsible for the reported [12] ultrahigh harmonic generation. First, the authors believe that the omission of bound states in [12] might be responsible for the unconventional generation. Second, they believe that the calculations underly-ing the ultrahigh harmonic regime may not be properly converged.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, in Sec. III, the different regimes of the magnetically induced HHG are presented with a particular focus on comparing the findings in [12] with the low harmonic regime underlying [13,14]. Additionally, numerical simulations of the scaling laws are presented and discussed in Sec.…”

Section: Introductionmentioning

confidence: 99%

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Noncollinear antiferromagnetic textures driven high-harmonic generation from magnetic dynamics in the absence of spin-orbit coupling

2023

J. Phys.: Condens. Matter

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We demonstrate the generation of high order harmonics in carrier pumping from precessing ferromagnetic or antiferromagnetic orders, excited via magnetic resonance, in the presence of topological antiferromagnetic textures. This results in an enhancement of the carrier dynamics by orders of magnitude, enabling for an emission deep in the THz frequency range. Interestingly, the generation process occurs in an intrinsic manner, and is solely governed by the interplay between the s-d exchange coupling underlying the noncollinear antiferromagnetic order and the dynamical s-d exchange constant of the magnetic drive. Therefore, the relativistic spin-orbit interaction is not required for the emergence of high harmonics in the pumped currents. Accordingly, the noncollinear topological antiferromagnetic order is presented as an alternative to spin-orbit interaction for the purpose of harnessing high harmonic emission in carrier pumping. Furthermore, we demonstrate the emergence of high harmonics from random magnetic defects. This suggests the universality of the magnetically induced high harmonic emission in the presence of real and/or momentum space noncollinear textures. Our proposal initiates a tantalizing prospect for the utilization of topological textures in the context of the highly active domains of ultrafast spintronics and THz emission.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Noncollinear antiferromagnetic textures driven high-harmonic generation from magnetic dynamics in the absence of spin-orbit coupling

2023

J. Phys.: Condens. Matter

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Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion

Ilyakov,

Brataas,

de Oliveira

et al. 2023

Nat Commun

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Efficient generation and control of spin currents launched by terahertz (THz) radiation with subsequent ultrafast spin-to-charge conversion is the current challenge for the next generation of high-speed communication and data processing units. Here, we demonstrate that THz light can efficiently drive coherent angular momentum transfer in nanometer-thick ferromagnet/heavy-metal heterostructures. This process is non-resonant and does neither require external magnetic fields nor cryogenics. The efficiency of this process is more than one order of magnitude higher as compared to the recently observed THz-induced spin pumping in MnF2 antiferromagnet. The coherently driven spin currents originate from the ultrafast spin Seebeck effect, caused by a THz-induced temperature imbalance in electronic and magnonic temperatures and fast relaxation of the electron-phonon system. Owing to the fact that the electron-phonon relaxation time is comparable with the period of a THz wave, the induced spin current results in THz second harmonic generation and THz optical rectification, providing a spintronic basis for THz frequency mixing and rectifying components.

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Rashba-like physics in condensed matter

et al. 2022

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Spin-orbit coupling induced ultrahigh-harmonic generation from magnetic dynamics

Cited by 7 publications

References 35 publications

Noncollinear antiferromagnetic textures driven high-harmonic generation from magnetic dynamics in the absence of spin-orbit coupling

Noncollinear antiferromagnetic textures driven high-harmonic generation from magnetic dynamics in the absence of spin-orbit coupling

Efficient ultrafast field-driven spin current generation for spintronic terahertz frequency conversion

Rashba-like physics in condensed matter

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