Coherent stimulated amplification of the skyrmion breathing

Wang, Bao; Lu, Xiao-Hu; Jia, Xiao; Xiong, Hao

doi:10.1016/j.chaos.2023.113484

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…are the equilibrium mean thermal magnon (phonon) number, with k B the Boltzmann constant and T the environmental temperature. Within the semiclassical approximation, the magnon and phonon operators are reduced to their expectation values [34,49], viz., m = m , m * = m † , b = b , and b * = b † , and the quantum noise terms can be safely dropped. In addition, the mean-field approximation by factorizing averages, i.e., m † m = m * m, is used to deal with the nonlinear term ig mb m † m. Then, the Heisenberg-Langevin equations read…”

Section: Physical Setup and Dynamical Equationmentioning

confidence: 99%

Generation of Second-Order Sideband through Nonlinear Magnetostrictive Interaction

Yang,

Wang,

Xiong

2023

Photonics

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Nonlinear interaction between the magnon mode and the mechanical mode in a magnomechanical system is treated analytically where the magnon mode is coherently driven by a bichromatic microwave drive field consisting of a strong pumping field and a weak probe field and that works within a perturbative regime. Using experimentally achievable parameters, we show that the magnonic second-order sideband is generated and can be considerably enhanced by increasing the power of the pumping field. The suppression of the magnonic second-order sideband generation at the resonance point is discussed. Furthermore, the efficiency of magnonic second-order sideband generation can be well controlled by adjusting the applied bias magnetic field strength, which is a particular feature compared to the optical second-order sideband. In addition to offering insights into the magnomechanical nonlinearity, the present results have the potential to pave the way for exploring practical applications for achieving high-precision measurement in magnonics.

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Section: Physical Setup and Dynamical Equationmentioning

confidence: 99%

Generation of Second-Order Sideband through Nonlinear Magnetostrictive Interaction

Yang,

Wang,

Xiong

2023

Photonics

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“…Magnetic skyrmions, a new type of locally stable spin texture that has developed from a theoretical prediction to an important research frontier, have given rise to many interesting phenomena within condensed matter physics and quantum optics [20][21][22][23]. For example, skyrmion spin textures have been proposed to interpret the Hall effect [21], the inversion of asymmetric bulk magnets [22], magnetic multilayers [23], and so on [24][25][26]. Moreover, magnetic skyrmions possess superior topologically protected stability and nanoscale size, and also have various manipulation methods.…”

Section: Introductionmentioning

confidence: 99%

Ultra-slow spin waves propagation based on skyrmion breathing

Liu,

Xiong

2023

New J. Phys.

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Spin wave has attracted significant attention in various fields because of its rich physics and potential applications in the development of spintronics devices in the post-Moore era. However, the analog of a subluminal-like propagation in the field of spin waves has not been well discussed. Here, we theoretically demonstrate the ultra-slow spin waves propagation in a nanoscale two-dimensional ferromagnetic film in the presence of magnon-skyrmion interaction. The minimum spin waves propagation velocity was estimated to be as low as 1.8 m/s by adjusting the system parameters properly, and the spin waves group delay and advance are dynamically tunable via the intensity or detuning of the control field, which allows the possibility of observing superluminal- and subluminal-like spin waves propagation in a single experimental setup. These results deepen our understanding of the spin wave-skyrmion interactions, open a novel and efficient pathway to realize ultra-slow spin waves propagation, and are expected to be applied to magnetic information storage and quantum operations of magnons.

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All-Optical Control of Bubble and Skyrmion Breathing

Titze,

Koraltan,

Schmidt

et al. 2024

Phys. Rev. Lett.

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Controlling the dynamics of topologically protected spin objects by all-optical means promises enormous potential for future spintronic applications. Excitation of bubbles and skyrmions in ferrimagnetic [Fe(0.35 nm)/Gd(0.40 nm)]160 multilayers by ultrashort laser pulses leads to a periodic modulation of the core diameter of these spin objects, the so-called breathing mode. We demonstrate versatile amplitude and phase control of this breathing using a double excitation scheme, where the observed dynamics is controlled by the excitation delay. We gain insight into both the timescale on which the breathing mode is launched and the role of the spin object size on the dynamics. Our results demonstrate that ultrafast optical excitation allows for precise tuning of the spin dynamics of trivial and nontrivial spin objects, showing a possible control strategy in device applications. Published by the American Physical Society 2024

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Coherent stimulated amplification of the skyrmion breathing

Cited by 3 publications

References 43 publications

Generation of Second-Order Sideband through Nonlinear Magnetostrictive Interaction

Generation of Second-Order Sideband through Nonlinear Magnetostrictive Interaction

Ultra-slow spin waves propagation based on skyrmion breathing

All-Optical Control of Bubble and Skyrmion Breathing

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