High-harmonic generation in spin and charge current pumping at ferromagnetic or antiferromagnetic resonance in the presence of spin-orbit coupling
| Autor: | Manjarres, J. Varela, Ly, O., Manchon, A., Kloss, T., Waintal, X., Nikolic, B.K. |
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| Přispěvatelé: | Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), HEP, INSPIRE |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
electron
Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics metal scattering FOS: Physical sciences spin magnetization current microwaves charge dimension [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] frequency adiabatic Mesoscale and Nanoscale Physics (cond-mat.mes-hall) time dependence Condensed Matter::Strongly Correlated Electrons [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] Quantum Physics (quant-ph) vector absorption [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat] [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph] |
| Popis: | 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 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 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 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. Comment: 9 pages, 5 figures, thoroughly revised; supplemental movie (and accompanying PDF) available from https://wiki.physics.udel.edu/qttg/Publications; see also related Comment arXiv:2212.06895 |
| Databáze: | OpenAIRE |
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