Comment on "Spin-orbit coupling induced ultrahigh-harmonic generation from magnetic dynamics" with prescriptions on how to validate scientific software for computational quantum transport

Nikolić, Branislav K.; Manjarres, Jalil Varela

doi:10.48550/arxiv.2212.06895

Cited by 2 publications

(21 citation statements)

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“…It has been suggested in [13,14] that the omission of bound states' contribution in [12] might be responsible for the observed ultra high harmonics. Therefore, it is important to clarify on the expected impact of bound states in transport calculations.…”

Section: Bound States' Impact On Transport Calculationsmentioning

confidence: 99%

“…It seems that the main flaw underlying the claims in [14] emanates basically from this point. Indeed, the authors agree on the fact that there should be high harmonics.…”

Section: On the Ultrahigh Harmonic Regimementioning

confidence: 99%

“…[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. [12] was deemed to be a result of numerical bugs.…”

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.…”

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: Bound States' Impact On Transport Calculationsmentioning

confidence: 99%

“…It seems that the main flaw underlying the claims in [14] emanates basically from this point. Indeed, the authors agree on the fact that there should be high harmonics.…”

Section: On the Ultrahigh Harmonic Regimementioning

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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High-harmonic generation in spin and charge current pumping at ferromagnetic or antiferromagnetic resonance in the presence of spin–orbit coupling

Manjarres¹,

Ly²,

Manchon

et al. 2023

J. Phys. Mater.

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One of the cornerstone effects in spintronics is spin pumping by dynamical magnetization that is steadily precessing (around, e.g., the $z$-axis) with frequency $\omega_0$, due to absorption of low-power microwaves of frequency $\omega_0$ under the resonance conditions and in the {\em absence} of any applied bias voltage. The two-decades-old ``standard model'' of this effect, based on the scattering theory of adiabatic quantum pumping, predicts that component $I^{S_z}$ of spin current vector $\big( I^{S_x}(t),I^{S_y}(t),I^{S_z} \big) \propto \omega_0$ is time-independent while $I^{S_x}(t)$ and $I^{S_y}(t)$ oscillate harmonically in time with a {\em single} frequency $\omega_0$; whereas pumped charge current is zero $I \equiv 0$ in the same adiabatic $\propto \omega_0$ limit. Here we employ more general than ``standard model'' approaches, time-dependent nonequilibrium Green's function (NEGF) and Floquet-NEGF, to predict unforeseen features of spin pumping---precessing localized magnetic moments within ferromagnetic metal (FM) or antiferromagnetic metal (AFM), whose conduction electrons are exposed to spin-orbit coupling (SOC) of either intrinsic or proximity origin, will pump both spin $I^{S_\alpha}(t)$ and charge $I(t)$ currents. All four of these functions harmonically oscillate in time at {\em both even an odd integer multiples} $N\omega_0$ of the driving frequency $\omega_0$. The cutoff order of such high-harmonics increases with SOC strength, reaching $N_\mathrm{max} \simeq 11$ in the chosen-for-demonstration one-dimensional FM or AFM models. Higher cutoff $N_\mathrm{max} \simeq 25$ can be achieved in realistic two-dimensional (2D) FM models defined on the honeycomb lattice, where we provide prescription on how to realize them using 2D magnets and their heterostructures.

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Comment on "Spin-orbit coupling induced ultrahigh-harmonic generation from magnetic dynamics" with prescriptions on how to validate scientific software for computational quantum transport

Cited by 2 publications

References 0 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

High-harmonic generation in spin and charge current pumping at ferromagnetic or antiferromagnetic resonance in the presence of spin–orbit coupling

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