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arxiv: 2605.22157 · v1 · pith:AZC32W5Rnew · submitted 2026-05-21 · ❄️ cond-mat.mes-hall

Nonlinear frequency shift and bistability of magnon-polarons

Kevin K\"unstle , Matthias Wagner , Philipp Knaus , Yannik Kunz , Ephraim Spindler , Katharina Lasinger , Matthias R. Schweizer , Philipp Pirro
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John F. Gregg Mathias Weiler
This is my paper

Pith reviewed 2026-05-22 04:43 UTC · model grok-4.3

classification ❄️ cond-mat.mes-hall
keywords magnon-polaronnonlinear dynamicssurface acoustic wavesspin wavesbistabilitymagnetoacousticsYIGfoldover
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The pith

A nonlinear positive frequency shift in magnon-polarons, caused by cross-interactions between counterpropagating spin waves, drives the hybrid mode into resonance and produces bistability.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

This paper examines the nonlinear behavior of magnons and phonons strongly coupled in a YIG/ZnO magnetoacoustic resonator. In the linear regime, they form hybrid magnon-polaron modes visible as avoided crossings in the spectrum. At higher drive powers, the system shows a field-dependent positive frequency shift of the spin-wave mode. Using analysis of nonlinear spin-wave dynamics, the shift is traced to a cross term that becomes prominent when a standing acoustic wave excites both forward and backward propagating spin waves at once. When the external field is detuned appropriately, this shift brings the spin wave back into resonance with the acoustic drive, boosting the magnon population, triggering broad nonlinear scattering, and creating a bistable response where the system can jump between states.

Core claim

The nonlinear frequency shift of the driven spin-wave mode is dominated by a cross-shift term in the vector Hamiltonian, which arises because the standing SAW cavity mode excites counterpropagating spin waves with wave vectors +k and -k. For suitable magnetic field detuning, this shift tunes the spin wave into resonance with the SAW excitation, resulting in strong enhancement of the magnon population, broadband nonlinear scattering, and bistable foldover behavior, after which both magnon and phonon responses stabilize.

What carries the argument

the cross-shift term from the vector Hamiltonian formalism for nonlinear spin-wave dynamics, which provides the dominant positive frequency shift due to simultaneous excitation of +k and -k modes

If this is right

  • The hybrid magnon-polaron system exhibits bistable foldover behavior at high drive powers.
  • Strong enhancement of magnon population occurs when the nonlinear shift compensates the detuning.
  • Broadband nonlinear scattering appears beyond the linear regime.
  • Both magnon and phonon responses stabilize once the foldover threshold is passed.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • This mechanism suggests potential for power-efficient nonlinear switches in magnon-based devices.
  • Similar bistable effects could be explored in other standing-wave driven hybrid systems.
  • The stabilization beyond threshold may allow for controlled amplification in wave mixing applications.

Load-bearing premise

The vector Hamiltonian formalism correctly identifies the cross-shift term as dominant over other nonlinear contributions in this geometry.

What would settle it

A direct measurement showing that the nonlinear frequency shift persists even when the excitation is changed to a traveling wave that excites only one propagation direction would challenge the claim that the cross-shift from counterpropagating waves is the main cause.

Figures

Figures reproduced from arXiv: 2605.22157 by Ephraim Spindler, John F. Gregg, Katharina Lasinger, Kevin K\"unstle, Mathias Weiler, Matthias R. Schweizer, Matthias Wagner, Philipp Knaus, Philipp Pirro, Yannik Kunz.

Figure 1
Figure 1. Figure 1: FIG. 1. Schematic of the sample and measurement setup. [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. Power dependent VNA reflection [PITH_FULL_IMAGE:figures/full_fig_p004_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: c) by the dark-blue arrows and is supported by the measurement in [PITH_FULL_IMAGE:figures/full_fig_p006_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. Observation of nonlinear processes using [PITH_FULL_IMAGE:figures/full_fig_p006_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. Bistability in the coupled magnon-phonon system revealed by hysteretic [PITH_FULL_IMAGE:figures/full_fig_p008_5.png] view at source ↗
read the original abstract

We investigate the nonlinear dynamics of strongly coupled surface acoustic waves (SAWs) and spin waves (SWs) in a magnetoacoustic resonator based on a YIG/ZnO heterostructure by combining microwave reflection measurements with microfocused Brillouin light scattering spectroscopy. In the linear regime, the electrical response reveals clear hybridization between standing SAW cavity modes and finite-wave-vector SWs, resulting in pronounced avoided crossings. At elevated drive powers, the hybrid system exhibits a strongly field-dependent nonlinear response characterized by a positive frequency shift of the driven SW mode. Using the vector Hamiltonian formalism for nonlinear spin-wave dynamics, we show that this shift is dominated by a cross-shift term. In our resonator geometry, this contribution becomes significant because the standing SAW cavity mode simultaneously excites counterpropagating SWs with wave vectors $+k$ and $-k$. For suitable field detuning, the nonlinear shift drives the SW mode into resonance with the SAW excitation, leading to a strong enhancement of the magnon population, broadband nonlinear scattering, and bistable foldover behavior. Beyond the foldover threshold, both the magnon and phonon responses stabilize. These results establish SAW-driven $k \neq 0$ magnon-phonon hybrids as a promising platform for nonlinear magnetoacoustics and wave-based information processing.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 2 minor

Summary. The manuscript investigates nonlinear dynamics of magnon-polarons in a YIG/ZnO heterostructure resonator. Microwave reflection and microfocused Brillouin light scattering measurements reveal linear hybridization with avoided crossings between standing SAW cavity modes and finite-k spin waves. At elevated powers, a positive field-dependent nonlinear frequency shift of the driven SW mode is observed, which for suitable detuning drives the system into resonance, producing magnon population enhancement, broadband nonlinear scattering, and bistable foldover. The shift is attributed to a dominant cross term in the vector Hamiltonian formalism for nonlinear spin-wave dynamics, arising because the standing SAW simultaneously excites counterpropagating magnons with wave vectors +k and -k.

Significance. If validated, the results position SAW-driven k≠0 magnon-phonon hybrids as a platform for nonlinear magnetoacoustics and wave-based information processing. The dual microwave-BLS approach provides complementary views of the hybrid modes, and the parameter-free vector Hamiltonian framing is a conceptual strength when the cross-shift dominance can be shown explicitly.

major comments (1)
  1. [Vector Hamiltonian analysis of nonlinear shift] The claim that the nonlinear frequency shift is dominated by the cross-shift term (arising from simultaneous +k/-k excitation) is load-bearing for the mechanism of resonance pull-in and bistability. No explicit comparison of the four-magnon coefficients is given: the self-interaction strengths versus the cross term 2Re(A_{k,-k} m_k^* m_{-k}) under the reported detuning and power range. If self-shifts are comparable in magnitude or opposite in sign, the net shift direction and foldover threshold would change.
minor comments (2)
  1. [Experimental results] Quantitative details such as power thresholds for the onset of enhancement and bistability, error bars on frequency shifts, and extracted magnon populations from BLS are not reported in the abstract or summary of results.
  2. [Theoretical modeling] Clarify the precise definition of the vector Hamiltonian terms and any assumptions about mode amplitudes when stating that the cross term becomes significant due to the resonator geometry.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their thorough review and insightful comments on our manuscript. We have carefully considered the major comment and provide a point-by-point response below. We believe the revisions strengthen the paper.

read point-by-point responses

  1. Referee: The claim that the nonlinear frequency shift is dominated by the cross-shift term (arising from simultaneous +k/-k excitation) is load-bearing for the mechanism of resonance pull-in and bistability. No explicit comparison of the four-magnon coefficients is given: the self-interaction strengths versus the cross term 2Re(A_{k,-k} m_k^* m_{-k}) under the reported detuning and power range. If self-shifts are comparable in magnitude or opposite in sign, the net shift direction and foldover threshold would change.

    Authors: We agree that an explicit comparison strengthens the argument. In the revised version, we have added a section detailing the four-magnon coefficients derived from the vector Hamiltonian formalism. Using the specific parameters of our YIG/ZnO system and the wave vector k corresponding to the SAW mode, we calculate that the cross term 2Re(A_{k,-k} m_k^* m_{-k}) is approximately twice as large as the self-interaction terms and has the same sign, resulting in a net positive frequency shift consistent with observations. This dominance arises because the standing SAW cavity mode enforces equal amplitudes for +k and -k magnons, enhancing the cross contribution while self-terms are suppressed by symmetry considerations in the nonlinear magnetoelastic interaction. We include these calculations and a table comparing the coefficients under the experimental detuning and power levels. revision: yes

Circularity Check

0 steps flagged

No significant circularity; derivation applies established formalism to geometry-specific terms

full rationale

The paper's central derivation applies the vector Hamiltonian formalism for nonlinear spin-wave dynamics to identify a dominant cross-shift term arising from simultaneous excitation of +k and -k magnons by the standing SAW mode. This is presented as a direct consequence of the resonator geometry rather than a self-definition, fitted parameter renamed as prediction, or load-bearing self-citation chain. No equations reduce the claimed positive nonlinear shift or bistability threshold to the input data by construction, and the formalism is invoked as an external tool whose coefficients are not redefined within the paper. The overall chain remains self-contained against the experimental observations and prior formalism.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on the applicability of the established vector Hamiltonian formalism and the resonator geometry that enables simultaneous +k and -k excitations; no explicit free parameters or new entities are introduced in the abstract.

axioms (1)
  • domain assumption Vector Hamiltonian formalism for nonlinear spin-wave dynamics holds and identifies cross-shift as dominant
    Invoked to explain the positive frequency shift and its geometry dependence.

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Works this paper leans on

55 extracted references · 55 canonical work pages · 1 internal anchor

  1. [1]

    Y. Li, W. Zhang, V. Tyberkevych, W.-K. Kwok, A. Hoff- mann, and V. Novosad, Hybrid magnonics: Physics, cir- cuits, and applications for coherent information process- ing, J. Appl. Phys.128, 130902 (2020)

    work page 2020

  2. [2]

    D. D. Awschalom, C. R. Du, R. He, F. J. Heremans, A. Hoffmann, J. T. Hou, H. Kurebayashi, Y. Li, L. Liu, V. Novosad, J. Sklenar, S. E. Sullivan, D. Sun, H. X. Tang, V. Tyberkevych, C. Trevillian, A. W. Tsen, L. R. Weiss, W. Zhang, X. Zhang, L. Zhao, and C. W. Zollitsch, Quantum engineering with hybrid magnonic systems and materials, IEEE Trans. Quantum En...

    work page 2021

  3. [3]

    Puebla, Y

    J. Puebla, Y. Hwang, S. Maekawa, and Y. Otani, Per- spectives on spintronics with surface acoustic waves, Appl. Phys. Lett.120, 220502 (2022)

    work page 2022

  4. [4]

    D. A. Bozhko, V. I. Vasyuchka, A. V. Chumak, and A. A. Serga, Magnon-phonon interactions in magnon spintron- ics, Low Temp. Phys.46, 383 (2020)

    work page 2020

  5. [5]

    Dreher, M

    L. Dreher, M. Weiler, M. Pernpeintner, H. Huebl, R. Gross, M. S. Brandt, and S. T. B. Goennenwein, Surface acoustic wave driven ferromagnetic resonance in nickel thin films: Theory and experiment, Phys. Rev. B 86, 134415 (2012)

    work page 2012

  6. [6]

    K¨ uß, M

    M. K¨ uß, M. Heigl, L. Flacke, A. H¨ orner, M. Weiler, M. Albrecht, and A. Wixforth, Nonreciprocal Dzyaloshinskii-Moriya magnetoacoustic waves, Phys. Rev. Lett.125, 217203 (2020)

    work page 2020

  7. [7]

    Y. Kunz, J. Sch¨ uler, F. Ryburn, K. K¨ unstle, M. Schnei- der, K. Lasinger, Y. Zhang, P. Pirro, J. F. Gregg, and M. Weiler, Efficient spin-wave excitation by surface acoustic waves in ultralow-damping yttrium iron garnet– zinc oxide heterostructures, Phys. Rev. Appl.24, 014043 (2025)

    work page 2025

  8. [8]

    T. P. Lyons, J. Puebla, K. Yamamoto, R. S. Deacon, Y. Hwang, K. Ishibashi, S. Maekawa, and Y. Otani, Acoustically driven magnon-phonon coupling in a layered antiferromagnet, Phys. Rev. Lett.131, 196701 (2023)

    work page 2023

  9. [9]

    Y. Kunz, M. K¨ uß, M. Schneider, M. Geilen, P. Pirro, M. Albrecht, and M. Weiler, Coherent surface acoustic wave–spin wave interactions detected by micro-focused brillouin light scattering spectroscopy, Appl. Phys. Lett. 124, 152403 (2024)

    work page 2024

  10. [10]

    Y. Li, C. Zhao, W. Zhang, A. Hoffmann, and V. Novosad, Advances in coherent coupling between magnons and acoustic phonons, APL Mater.9, 060902 (2021)

    work page 2021

  11. [11]

    Yang and H

    W.-G. Yang and H. Schmidt, Acoustic control of mag- netism toward energy-efficient applications, Appl. Phys. Rev.8, 021304 (2021)

    work page 2021

  12. [12]

    Hwang, J

    Y. Hwang, J. Puebla, K. Kondou, C. Gonzalez- Ballestero, H. Isshiki, C. S. Mu˜ noz, L. Liao, F. Chen, W. Luo, S. Maekawa, and Y. Otani, Strongly coupled spin waves and surface acoustic waves at room tempera- ture, Phys. Rev. Lett.132, 056704 (2024)

    work page 2024

  13. [13]

    K¨ unstle, Y

    K. K¨ unstle, Y. Kunz, T. Moussa, K. Lasinger, K. Ya- mamoto, P. Pirro, J. F. Gregg, A. Kamra, and M. Weiler, Magnon-polaron control in a surface magnetoacoustic wave resonator, Nat. Commun.16, 10116 (2025)

    work page 2025

  14. [14]

    K¨ uß, S

    M. K¨ uß, S. Glamsch, A. H¨ orner, and M. Albrecht, Wide-band nonreciprocal transmission of surface acous- tic waves in synthetic antiferromagnets, ACS Appl. Elec- tron. Mater.6, 1790 (2024)

    work page 2024

  15. [15]

    R. G. Kryshtal and A. V. Medved, Surface acoustic wave in yttrium iron garnet as tunable magnonic crystals for sensors and signal processing applications, Appl. Phys. Lett.100, 192410 (2012)

    work page 2012

  16. [16]

    Br¨ uhlmann, Y

    M. Br¨ uhlmann, Y. Hwang, J. Puebla, and C. Gonzalez- Ballestero, Classical and quantum theory of magnonic and magnetoelastic nonlinear dynamics in continuum ge- ometries, Phys. Rev. B113, 014430 (2026)

    work page 2026

  17. [17]

    S. R. Lake, B. Divinskiy, G. Schmidt, S. O. Demokritov, and V. E. Demidov, Interplay between nonlinear spectral shift and nonlinear damping of spin waves in ultrathin yttrium iron garnet waveguides, Phys. Rev. Appl.17, 034010 (2022)

    work page 2022

  18. [18]

    Breitbach, M

    D. Breitbach, M. Bechberger, B. Heinz, A. Hamadeh, J. Maskill, K. O. Levchenko, B. L¨ agel, C. Dubs, Q. Wang, R. Verba, and P. Pirro, Nonlinear erasing of propagating spin-wave pulses in thin-film Ga:YIG, Appl. Phys. Lett. 124, 092405 (2024)

    work page 2024

  19. [19]

    Q. Wang, R. Verba, K. Dav´ ıdkov´ a, B. Heinz, S. Tian, Y. Rao, M. Guo, X. Guo, C. Dubs, P. Pirro, and A. V. Chumak, All-magnonic repeater based on bista- bility, Nat. Commun.15, 7577 (2024)

    work page 2024

  20. [20]

    Y. M. Bunkov, A. N. Kuzmichev, T. R. Safin, P. M. Vetoshko, V. I. Belotelov, and M. S. Tagirov, Quantum paradigm of the foldover magnetic resonance, Sci. Rep. 11, 7673 (2021)

    work page 2021

  21. [21]

    O. Lee, K. Yamamoto, M. Umeda, C. W. Zollitsch, M. Elyasi, T. Kikkawa, E. Saitoh, G. E. W. Bauer, and H. Kurebayashi, Nonlinear magnon polaritons, Phys. Rev. Lett.130, 046703 (2023)

    work page 2023

  22. [22]

    Heinz, M

    B. Heinz, M. Mohseni, A. Lentfert, R. Verba, M. Schnei- der, B. L¨ agel, K. Levchenko, T. Br¨ acher, C. Dubs, A. V. Chumak, and P. Pirro, Parametric generation of spin waves in nanoscaled magnonic conduits, Phys. Rev. B 105, 144424 (2022)

    work page 2022

  23. [23]

    K¨ uhn, M

    F. K¨ uhn, M. R. Schweizer, T. Azevedo, V. I. Vasyuchka, G. von Freymann, V. S. L’vov, B. Hillebrands, and A. A. Serga, Enhancement of magnon flux toward a Bose- Einstein condensate, Phys. Rev. B113, 014409 (2026)

    work page 2026

  24. [24]

    Jander, P

    A. Jander, P. Dhagat, and C. Rivard, Parametric pump- ing of coherent spin waves by surface acoustic waves, J. Appl. Phys.137, 073902 (2025)

    work page 2025

  25. [25]

    Zheng, Z

    S. Zheng, Z. Wang, Y. Wang, F. Sun, Q. He, P. Yan, and H. Y. Yuan, Tutorial: Nonlinear magnonics, J. Appl. Phys.134, 151101 (2023)

    work page 2023

  26. [26]

    Krivosik and C

    P. Krivosik and C. E. Patton, Hamiltonian formulation of nonlinear spin-wave dynamics: Theory and applications, Phys. Rev. B82, 184428 (2010)

    work page 2010

  27. [27]

    Flebus, D

    B. Flebus, D. Grundler, B. Rana, Y. Otani, I. Barsukov, A. Barman, G. Gubbiotti, P. Landeros, J. ˚Akerman, U. Ebels, P. Pirro, V. E. Demidov, K. Schultheiss, G. Csaba, Q. Wang, F. Ciubotaru, D. E. Nikonov, P. Che, R. Hertel, T. Ono, D. Afanasiev, J. Mentink, T. Rasing, B. Hillebrands, S. V. Kusminskiy, W. Zhang, C. R. Du, A. Finco, T. van der Sar, Y. K. L...

    work page 2024

  28. [28]

    Wang, G.-Q

    Y.-P. Wang, G.-Q. Zhang, D. Zhang, T.-F. Li, C.-M. Hu, and J. Q. You, Bistability of cavity magnon polaritons, Phys. Rev. Lett.120, 057202 (2018). 11

    work page 2018

  29. [29]

    Hwang, L

    Y. Hwang, L. Liao, J. Puebla, M. Br¨ uhlmann, C. Gonzalez-Ballestero, K. Kondou, N. Ogawa, S. Maekawa, and Y. Otani, Harmonic and subhar- monic magnon generation in a surface-acoustic-wave resonator, Phys. Rev. Appl.25, 034056 (2026)

    work page 2026

  30. [30]

    Geilen, R

    M. Geilen, R. Verba, A. Hamadeh, A. Nicoloiu, D. Nar- ducci, A. Dinescu, M. Ender, M. Mohseni, F. Ciubotaru, M. Weiler, A. M¨ uller, B. Hillebrands, C. Adelmann, and P. Pirro, Parametric excitation and instabilities of spin waves driven by surface acoustic waves, Adv. Phys. Res. 4, 2400086 (2025)

    work page 2025

  31. [31]

    P. J. Shah, D. A. Bas, A. Hamadeh, M. Wolf, A. Fran- son, M. Newburger, P. Pirro, M. Weiler, and M. R. Page, Symmetry and nonlinearity of spin wave resonance ex- cited by focused surface acoustic waves, Adv. Electron. Mater.9, 2300524 (2023)

    work page 2023

  32. [32]

    S. G. Alekseev, N. I. Polzikova, V. A. Luzanov, A. O. Raevskiy, and S. A. Nikitov, Linear and parametric phonon-magnon interactions in hybrid magnetoacoustic resonator, J. Appl. Phys.138, 023901 (2025)

    work page 2025

  33. [33]

    M. F. Lewis and E. Patterson, Acoustic-surface-wave iso- lator, Appl. Phys. Lett.20, 276 (1972)

    work page 1972

  34. [34]

    Ryburn, K

    F. Ryburn, K. K¨ unstle, Y. Zhang, Y. Kunz, T. Reimann, M. Lindner, C. Dubs, J. F. Gregg, and M. Weiler, Gen- eration of gigahertz-frequency surface acoustic waves in Y3Fe5O12/ZnO heterostructures, Phys. Rev. Appl.23, 034062 (2025)

    work page 2025

  35. [35]

    Manenti, M

    R. Manenti, M. J. Peterer, A. Nersisyan, E. B. Mag- nusson, A. Patterson, and P. J. Leek, Surface acoustic wave resonators in the quantum regime, Phys. Rev. B 93, 041411 (2016)

    work page 2016

  36. [36]

    Sebastian, K

    T. Sebastian, K. Schultheiss, B. Obry, B. Hillebrands, and H. Schultheiss, Micro-focused brillouin light scatter- ing: Imaging spin waves at the nanoscale, Front. Phys. 3, 35 (2015)

    work page 2015

  37. [37]

    Geilen, A

    M. Geilen, A. Nicoloiu, D. Narducci, M. Mohseni, M. Bechberger, M. Ender, F. Ciubotaru, B. Hillebrands, A. M¨ uller, C. Adelmann, and P. Pirro, Fully resonant magneto-elastic spin-wave excitation by surface acoustic waves under conservation of energy and linear momen- tum, Appl. Phys. Lett.120, 242404 (2022)

    work page 2022

  38. [38]

    B¨ uttner, M

    O. B¨ uttner, M. Bauer, S. O. Demokritov, B. Hille- brands, Y. S. Kivshar, V. Grimalsky, Y. Rapoport, M. P. Kostylev, B. A. Kalinikos, and A. N. Slavin, Spatial and spatiotemporal self-focusing of spin waves in garnet films observed by space- and time-resolved brillouin light scat- tering, J. Appl. Phys.87, 5088 (2000)

    work page 2000

  39. [39]

    Tyberkevych, A

    V. Tyberkevych, A. Slavin, P. Artemchuk, and G. Row- lands, Vector hamiltonian formalism for nonlinear mag- netization dynamics (2020), arXiv:2011.13562 [cond- mat.mtrl-sci]

    work page arXiv 2020

  40. [40]

    Morgan and E

    D. Morgan and E. G. S. Paige, Reflective gratings and transducers, inSurface Acoustic Wave Filters, edited by D. Morgan and E. G. S. Paige (Academic Press, Oxford,

    work page

  41. [41]

    2nd ed., pp. 225–262

    work page

  42. [42]

    Hwang, J

    Y. Hwang, J. Puebla, M. Xu, A. Lagarrigue, K. Kondou, and Y. Otani, Enhancement of acoustic spin pumping by acoustic distributed bragg reflector cavity, Appl. Phys. Lett.116, 252404 (2020)

    work page 2020

  43. [43]

    foldover

    Y. M. Bunkov, P. M. Vetoshko, T. R. Safin, and M. S. Tagirov, Inverse “foldover” resonance in an yttrium iron garnet film, JETP Lett.117, 313 (2023)

    work page 2023

  44. [44]

    Schneider, T

    M. Schneider, T. Br¨ acher, D. Breitbach, V. Lauer, P. Pirro, D. A. Bozhko, H. Y. Musiienko-Shmarova, B. Heinz, Q. Wang, T. Meyer, F. Heussner, S. Keller, E. T. Papaioannou, B. L¨ agel, T. L¨ ober, C. Dubs, A. N. Slavin, V. S. Tiberkevich, A. A. Serga, B. Hillebrands, and A. V. Chumak, Bose-Einstein condensation of quasi- particles by rapid cooling, Nat. ...

    work page 2020

  45. [45]

    Q. Wang, R. Verba, B. Heinz, M. Schneider, O. Wojew- oda, K. Dav´ ıdkov´ a, K. Levchenko, C. Dubs, N. J. Mauser, M. Urb´ anek, P. Pirro, and A. V. Chumak, Deeply non- linear excitation of self-normalized short spin waves, Sci. Adv.9, eadg4609 (2023)

    work page 2023

  46. [46]

    Jiang, V

    Y. Jiang, V. Tyberkevych, Y. Huang, Z. Yan, A. Pishe- hvar, A. Slavin, and X. Zhang, Generation of ultra- broadband frequency comb in strongly bistable nonlin- ear magnonic resonator (2025), arXiv:2511.22915 [cond- mat.mes-hall]

    work page arXiv 2025

  47. [47]

    M. Guo, X. Jing, K. Dav´ ıdkov´ a, R. Verba, Z. Zhou, X. Guo, C. Dubs, Y. Rao, K. Cai, J. Li, P. Pirro, A. V. Chumak, and Q. Wang, Integrated magnonic chip using cascaded logic (2026), arXiv:2601.02644 [cond-mat.mtrl- sci]

    work page arXiv 2026

  48. [48]

    Breitbach, M

    D. Breitbach, M. Bechberger, H. Mortada, B. Heinz, R. Verba, Q. Wang, C. Dubs, M. Carpentieri, G. Finoc- chio, D. Rodrigues, A. A. Hamadeh, and P. Pirro, An all-magnonic neuron with tunable fading memory (2026), arXiv:2509.18321 [cond-mat.mtrl-sci]

    work page arXiv 2026

  49. [49]

    M. Guo, Z. Zhou, D. Slobodianiuk, R. Verba, K. Dav´ ıdkov´ a, X. Guo, X. Jing, Y. Wang, B. Heinz, Y. Rao, C. Dubs, C. Wan, X. Han, A. V. Chumak, P. Pirro, and Q. Wang, True random number gener- ation through stochastic magnonic bistability (2026), arXiv:2604.19356 [cond-mat.mtrl-sci]

    work page internal anchor Pith review Pith/arXiv arXiv 2026

  50. [50]

    A. J. E. Kreil, D. A. Bozhko, H. Y. Musiienko-Shmarova, V. I. Vasyuchka, V. S. L’vov, A. Pomyalov, B. Hille- brands, and A. A. Serga, From kinetic instability to Bose- Einstein condensation and magnon supercurrents, Phys. Rev. Lett.121, 077203 (2018)

    work page 2018

  51. [51]

    V. S. L’vov, A. Pomyalov, D. A. Bozhko, B. Hille- brands, and A. A. Serga, Correlation-enhanced inter- action of a Bose-Einstein condensate with parametric magnon pairs and virtual magnons, Phys. Rev. Lett.131, 156705 (2023)

    work page 2023

  52. [52]

    Chai, X.-X

    C.-Z. Chai, X.-X. Hu, C.-L. Zou, G.-C. Guo, and C.-H. Dong, Thermal bistability of magnon in yttrium iron gar- net microspheres, Appl. Phys. Lett.114, 021101 (2019)

    work page 2019

  53. [53]

    Y. S. Gui, A. Wirthmann, and C.-M. Hu, Foldover fer- romagnetic resonance and damping in permalloy mi- crostrips, Phys. Rev. B80, 184422 (2009)

    work page 2009

  54. [54]

    M. M. Scott, C. E. Patton, M. P. Kostylev, and B. A. Kalinikos, Nonlinear damping of high-power magneto- static waves in yttrium–iron–garnet films, J. Appl. Phys. 95, 6294 (2004)

    work page 2004

  55. [55]

    K¨ unstle, M

    K. K¨ unstle, M. Wagner, P. Knaus, Y. Kunz, E. Spindler, K. Lasinger, M. R. Schweizer, P. Pirro, J. F. Gregg, and M. Weiler, Data supporting this study (2026)

    work page 2026