Dr. Helmut Schultheiß

Group Leader
Spin: Interaction and Control
Spin interaction and control
Phone: +49 351 260 3243

Spin: Interaction and Control

Magnonincs bridge

In our group, we investigate the fundamental connections between spin waves, spin-polarized electrons and photons, combining the three research directions of magnonics, spintronics and photonics. This research is driven by the demand for new concepts, technologies and materials for information processing since, on one side, electronics are reaching their physical limit of speed due to waste heat generation and, on the other side, photonics lacks fast, electronic control on small length scales. Spin waves, being the fundamental dynamic excitations of ferromagnets with frequencies in the gigahertz to terahertz regime, offer the unique opportunity to merge the best aspects of spintronics and photonics opening new pathways for information processing. You can find a more detailed overview of our current research topics here.

Our methods cover for example time- and phase-resolved Brillouin light scattering microscopy (TR-µBLS), time-resolved magneto-optical Kerr microscopy (TR-µMOKE), a femtosecond-laser system, electrical detection via the (inverse) spin Hall effect (ISHE) as well as micromagnetic simulation.

Joining our group

If you are interested in joining our group (i.e. for a Bachelor, Master or PhD Thesis, as a research assistant or postdoc) see our open positions section for possible topics or directly contact Dr. Helmut Schultheiß. Exemplary topics are:

Interaction of spin waves and spin-polarized currents

Using the spin degree of electrons and coherent transport of spin information is one of the grand challenges of condensed matter physics. Spin waves, which are also called magnons, are the fundamental excitation quanta of a ferromagnet and can interact with spin-polarized currents. This interaction can be studied on a nanometer length scale using magneto-optical techniques such as Kerr-effect and Brillouin light scattering microscopy as well as electrical measurements based on the (inverse) spin-Hall effect.

Magnon-Qubit Hybrid Systems

The frequency range of magnons in metallic ferromagnets perfectly matches the energy gap of various crystal defects in diamond or SiC crystals. These defects host electronic states within the bandgap and thus are ideal two-level systems for studying quantum phenomena. We experimentally demonstrate a frequency downconversion of the applied microwave excitation which allows a pure-magnonic control of the spin qubit at previously inaccessible frequencies. Our results open new avenues for developing scalable hybrid quantum technologies while offering a testbed for exploring the convergence of nonlinear, threshold-activated systems with intrinsically linear quantum systems.

Publications 2023

  • T. Hache, L. Körber, T. Hula, K. Lenz, A. Kákay, O. Hellwig, J. Lindner, J. Fassbender, H. Schultheiss
    "Control of four-magnon scattering by pure spin current in a magnonic waveguide"
    Phys. Rev. Appl. 20, 014062 (2023)
  • L. Körber, C. Heins, I. Soldatov, R. Schäfer, A. Kákay, H. Schultheiss, K. Schultheiss
    "Modification of three-magnon splitting in a flexed magnetic vortex"
    Appl. Phys. Lett. 122, 092401 (2023)
  • L. Körber, C. Heins, T. Hula, J.V. Kim, S. Thlang, H. Schultheiss, J. Fassbender, K. Schultheiss
    "Pattern recognition with a magnon-scattering reservoir"
    Nature Communication 14, 3954 (2023)
  • O. Gladii, R. Salikhov, O. Hellwig, H. Schultheiss, J. Lindner, R.A. Gallardo
    "Spin-wave nonreciprocity at the spin-flop transition region in synthetic antiferromagnets
    Phys. Rev. B 107, 104419 (2023)
  • V. Iurchuk, J. Pablo-Navarro, T. Hula, R. Narkowicz, G. Hlawacek, L. Körber, A. Kákay, H. Schultheiss, J. Fassbender, K. Lenz, J. Lindner
    "Tailoring crosstalk between localized 1D spin-wave nanochannels using focused ion beams"
    Scientific Reports 13, 764 (2023)

Publications 2022

  • T. Hula, K. Schultheiss, F.J. Trindade Goncalves, L. Körber, M. Bejarano, M. Copus, L. Flacke, L. Liensberger, A. Buzdakov, A. Kakay, M. Weiler, R. Camley, J. Fassbender, H. Schultheiss
    "Spin-wave frequency combs"
    Appl. Phys. Lett. 121, 112404 (2022)
  • A.V. Chumak, P. Kabos, M. Wu et al.
    "Advances in Magnetics Roadmap on Spin-Wave Computing"
    IEEE Transactions on Magnetics 58, 0800172 (2022).
  • Q. Zhang, J. Liang, K. Bi, L. Zhao, H. Bai, Q. Cui, H.A. Zhou, H. Bai, H. Feng, W. Song, G. Chai, O. Gladii, H. Schultheiss, T. Zhu, J. Zhang, Y. Peng, H. Yang, W. Jiang
    "Quantifying the Dzyaloshinkii-Moriya Interaction Induced by the Bulk Magnetic Asymmetry"
    Phys. Rev. Lett. 128, 167202 (2022).

Publications 2021

  • F.J. Trindade Goncalves, T. Hache, M. Bejarano, T. Hula, O. Hellwig, J. Faßbender, H. Schultheiss
    "Agility of spin Hall nano-oscillators"
    Physical Review Applied 16, 054050 (2021)
  • J. Chen, H. Wang, T. Hula, C. Liu, S. Liu, T. Liu, H. Jia, Q. Song, C. Guo, Y. Zhang, J. Zhang, X. Han, D. Yu, M. Wu, H. Schultheiss, H. Yu
    "Reconfigurable Spin-Wave Interferometer at the Nanoscale"
    Nano Letters 21, 6237 (2021)
  • M.M. Salazar-Cardona, L. Körber, H. Schultheiss, K. Lenz, A. Thomas, K. Nielsch, A. Kákay, and J.A. Otálora
    "Nonreciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization"
    Appl. Phys. Lett. 118, 262411 (2021)
  • K. Schultheiss, N. Sato, P. MaXhies, L. Koerber, K. Wagner, T. Hula, O. Gladii, J. E. Pearson, A. Hoffmann, M. Helm, J. Fassbender, and H. Schultheiss
    "Time refraction of spin waves"
    Phys. Rev. Lett. 126, 137201 (2021)
  • N. Neugebauer, T. Hache, M.T. Elm, D.M. Hofmann, C. Heiliger, H. Schultheiss, and P.J. Klar
    "Frequency and magnetic field dependent properties of ordered magnetic nanoparticle arrangements"
    Phys. Rev. B 103, 094438 (2021)
  • R. Verba, L. Körber, K. Schultheiss, H. Schultheiss, V. Tiberkevich, and A. Slavin
    "Theory of three-magnon interaction in a vortex-state magnetic nanodot"
    Phys. Rev. B 103, 014413 (2021)
  • M. Bejarano, F.J. Goncalves, M. Hollenbach, T. Hache, T. Hula, Y. Berencen, J. Fassbender, M. Helm, G.V. Astakhov, and H. Schultheiss
    "Mapping the stray fields of a micromagnet using spin centers in SiC"
    IEEE Mag. Lett. (2021)
  • A. Barman, G. Gubbiotti et al.
    "The 2021 Magnonics Roadmap"
    J. Phys.: Condens. Matter (2021)

Publications 2020

  • L. Körber, K. Schultheiss, T. Hula, R. Verba, J. Faßbender, A. Kákay, H. Schultheiss
    "Nonlocal stimulation of three-magnon splitting in a magnetic vortex"
    Phys. Rev. Lett. 125, 207203 (2020)
  • T. Hula, K. Schultheiss, A. Buzdakov, L. Körber, M. Bejarano, L. Flacke, L. Liensberger, M. Weiler, J.M. Shaw, H.T. Nembach, J. Fassbender, H. Schultheiss
    "Nonlinear losses in magnon transport due to four-magnon scattering"
    Appl. Phys. Lett. 117, 042404 (2020)
  • O. Wojewoda, T. Hula, L. Flajšman, M. Vaňatka, J. Gloss, J. Holobrádek, M. Staňo, S. SGenen, L. Körber, K. Schultheiss, M. Schmid, H. Schultheiss, Michal Urbánek
    "Propagation of spin waves through a Néel domain wall"
  • Appl. Phys. Lett. 117, 022405 (2020)
    T. Hache, Y. Li, T. Weinhold, B. Scheumann, F. Gonçalves, O. Hellwig, J. Faßbender, H. Schultheiss
    "Bipolar spin Hall nano-oscillators"
    Appl. Phys. Lett. 116, 192405 (2020)
  • T. Hache, M. Vaňatka, L. Flajšman, T. Weinhold, T. Hula, O. Ciubotariu, M. Albrecht, B. Arkook, I. Barsukov, L. Fallarino, O. Hellwig, J. Fassbender, M. Urbánek, H. Schultheiss
    "Free-standing and positionable microwave antenna device for magneto-optical spectroscopy experiments"
    Phys. Rev. Appl. 13, 054009 (2020)
  • L. Flajšman, K. Wagner, M. Vaňatka, J. Gloss, V. Křižáková, M. Schmid, H. Schultheiss, and M. Urbánek
    "Zero-field propagation of spin waves in waveguides prepared by focused ion beam direct writing"
    Phys. Rev. B 101, 014436 (2020)

Publications 2019

  • H. Reichlova, T. Janda, J. Godinho, A. Markou, D. Kriegner, R. Schlitz, J. Zelezny, Z. Soban, M. Bejarano, H. Schultheiss, P. Nemec, T. Jungwirth, C. Felser, J. Wunderlich, and S. Goennenwein
    "Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn3Sn"
    Nature Comm. 10, 5459 (2019)
  • K. Lenz, R. Narkowicz, K. Wagner, C. F. Reiche, J. Körner, T. Schneider, A. Kákay, H. Schultheiss, U. Weissker, D. Wolf, D. Suter, B. Büchner, J. Fassbender, T. Mühl, and J. Lindner
    "Magnetization Dynamics of an Individual Single-Crystalline Fe-Filled Carbon Nanotube"
    Small 15, 1904315 (2019)
  • L. Flacke, L. Liensberger, M. Althammer, H. Huebl, S. Geprägs, K. Schultheiss, A. Buzdakov, T. Hula, H. Schultheiss, E. R. J. Edwards, H. T. Nembach, J. M. Shaw, R. Gross, and M. Weiler
    "High spin-wave propagation length consistent with low damping in a metallic ferromagnet"
    Appl. Phys. Lett. 115, 122402 (2019)
  • N. Sato, K. Schultheiss, L. Körber, N. Puwenberg, T. Mühl, A. A. Awad, S. S. P. K. Arekapudi, O. Hellwig, J. Fassbender, and H. Schultheiss
    "Domain wall-based spin-Hall nano-oscillators"
    Phys. Rev. Lett. 123, 057204 (2019)
  • D. Slobodianiuk, G. Melkov, K. Schultheiss, H. Schultheiss, and R. Verba
    "Nonlinear ferromagnetic resonance in the presence of 3-magnon scattering in magnetic nanostructures"
    IEEE Mag. Lett. 10, 6103405 (2019)
  • T. Hache, T. Weinhold, K. Schultheiss, J. Stigloher, F. Vilsmeier, C. Back, S. S. P. K. Arekapudi, O. Hellwig, J. Fassbender, and H. Schultheiss
    "Combined frequency and time domain measurements on injection-locked, constriction-based spin Hall nano-oscillators"
  • Appl. Phys. Lett. 114, 102403 (2019)
    K. Schultheiss, R. Verba, F. Wehrmann, K. Wagner, L. Körber, T. Hula, T. Hache, A. Kákay, A. A. Awad, V. Tiberkevich, A. N. Slavin, J. Fassbender, and H. Schultheiss
    "Excitation of whispering gallery magnons in a magnetic vortex"
    Phys. Rev. Lett. 122, 097202 (2019)

Publications 2018

  • J. Osten, K. Lenz, H. Schultheiss, J. Lindner, J. McCord, J. Fassbender
    "Interplay between magnetic domain patterning and anisotropic magnetoresistance probed by magneto-optics"
    Phys. Rev. B 97, 014415 (2018),
  • K. Wagner, A. Smith, T. Hache, J. - R. Chen, L. Yang, E. Montoya, K. Schultheiss, J. Lindner,
    J. Fassbender, I. Krivorotov, and H. Schultheiss
    "Injection locking of multiple auto-oscillation modes in a tapered nanowire spin Hall oscillator"
    Scientific Reports 8, 16040 (2018)

Publications 2017

  • L. Körber, K. Wagner, A. Kákay, H. Schultheiss
    "Spin-wave reciprocity in the presence of Néel walls"
    IEEE Magnetic Letters PP, 99 (2017),
  • H. Schultheiss
    "Spins in Formation"
    Physik Journal Nr. 8/9 (2017)
  • A.V. Chumak, and H. Schultheiss
    "Magnonics: Spin Waves Connecting Charges, Spins and Photons" (Editorial)
    J. Phys. D: Appl. Phys. 50, 300201 (2017)
  • J.A. Otálora, M. Yan, H. Schultheiss, R. Hertel, A. Kákay
    "Asymmetric spin-wave dispersion in ferromagnetic nanotubes induced by surface curvature"
    Phys Rev B. 95, 184415 (2017), 

Publications 2016

  • J.A. Otálora, M. Yan, H. Schultheiss, R. Hertel, A. Kákay
    "Curvature-Induced Asymmetric Spin-Wave Dispersion"
    Phys. Rev. Lett. 117, 227203 (2016),
  • H. Schultheiss
    "Optik einmal anders"
    Physik Journal Nr. 10 (2016)
  • K. Wagner, A. Kákay, K. Schultheiss, A. Henschke, T. Sebastian, and H. Schultheiss
    "Magnetic domain walls as reconfigurable spin-wave nanochannels"
    Nature Nanotechnology 11, 432 (2016),
  • M. Langer, K. Wagner, T. Sebastian, R. Hübner, J. Grenzer, Y. Wang, T. Kubota, T. Schneider, S. Stienen, J. Linder, K. Lenz, H. Schultheiss, J. Linder, K. Takanashi, R. Arias, J. Fassender
    "Parameter-free determination of the exchange constant in thin films using magnonic patterning"
    Appl. Phys. Lett. 108, 102402 (2016),
  • J.A. Otálora, M. Yan, H. Schultheiss, R. Hertel, A. Kákay
    "Curvature-Induced Asymmetric Spin-Wave Dispersion"
    Phys. Rev. Lett. 117, 227203 (2016),
  • H. Schultheiss
    "Magnetic domain walls as reconfigurable spin-wave nano-channels (Conference Presentation)"
    Proc. SPIE 9931, Spintronics IX, 99313T (2016)

Publications 2015

  • T. Sebastian, K. Schultheiss, B. Obry, B. Hillebrands, and H. Schultheiss
    "Micro-focused Brillouin light scattering: imaging spin waves at the nanoscale"
    Front. Phys. 3, (2015),
  • E. Montoya, T. Sebastian, H. Schultheiss, B. Heinrich, R. Camley, Z. Celinski
    "Magnetization Dynamics", Book chapter in Magnetism of Surfaces, Interfaces and Nanoscale Materials, Elsevier (2016), ISBN: 978-0-444-62634-9

Publications 2014

  • K. Vogt, F.Y. Fradin, J.E. Pearson, T. Sebastian, S.D. Bader, B. Hillebrands, A. Hoffmann, and H. Schultheiss
    “Realization of a spin-wave multiplexer”
    Nature Comms. 5, 3727 (2014),
  • A. Hassdenteufel, C. Schubert, B. Hebler, H. Schultheiss, J. Fassbender, M. Albrecht, and R. Bratschitsch
    "All-optical helicity dependent magnetic switching in Tb-Fe thin films with a MHz laser oscillator"
    Optics Express 22, 10017 (2014),
  • A. Hoffmann, and H. Schultheiss
    "Mesoscale Magnetism"
    Curr. Opin. Solid State Mater. Sci. (2014),
  • N. Tahir, R. Gieniusz, A. Maziewski, R. Bali, M.P. Kostylev, S. Wintz, H. Schultheiss, S. Facsko, K. Potzger, J. Lindner, and J. Fassbender
    "Magnetization Reversal of Disorder-Induced Ferromagnetic Regions in Fe60Al40 Thin Films"
    IEEE Transactions on Magnetics 50, 6101304 (2014), https://10.1109/TMAG.2014.2321564

Selected Publications before 2014

  • H. Schultheiss, J.E. Pearson, S.D. Bader, and A. Hoffmann,
    “Thermoelectric detection of spin waves”
    Phys. Rev. Lett. 109, 237204 (2012), https://10.1103/PhysRevLett.109.237204
  • H. Schultheiss, K. Vogt, and B. Hillebrands,
    “Direct observation of nonlinear four-magnon scattering in spin-wave microconduits”
    Phys. Rev. B 86, 054414 (2012), https://10.1103/PhysRevB.86.054414
  • K. Vogt, H. Schultheiss, S. Jain, J.E. Pearson, A. Hoffmann, S.D. Bader, and B. Hillebrands,
    “Spin waves turning a corner”
    Appl. Phys. Lett. 101, 042410 (2012), https://10.1063/1.4738887
  • H. Schultheiss, X. Janssens, M. van Kampen, F. Ciubotaru, S. Hermsdoerfer, B. Obry, A. Laraoui, A.A. Serga, L. Lagae, A.N. Slavin, B. Leven, and B. Hillebrands,
    “Direct current control of three magnon scattering processes in spin-valve nanocontacts”
    Phys. Rev. Lett. 103, 157202 (2009), https://10.1103/PhysRevLett.103.157202
  • H. Schultheiss, S. Schäfer, P. Candeloro, B. Leven, B. Hillebrands, and A.N. Slavin,
    “Observation of coherence and partial decoherence of quantized spin waves in nano-scaled magnetic ring structures”
    Phys. Rev. Lett. 100, 047204 (2008), https://10.1103/PhysRevLett.100.047204