Macrospin Dynamics in Antiferromagnets Triggered by Sub-20 femtosecond Injection of Nanomagnons

Abstract

The understanding of how the sub-nanoscale exchange interaction evolves in macroscale correlations and ordered phases of matter, such as magnetism and superconductivity, requires to bridge the quantum and classical worlds. This monumental challenge has so far only been achieved for systems close to their thermodynamical equilibrium. Here we follow in real time the ultrafast dynamics of the macroscale magnetic order parameter triggered by the impulsive optical generation of spin excitations with the shortest possible nanometer-wavelength and femtosecond-period. Our experiments also disclose a possibility for the coherent control of these femtosecond nanomagnons, which are defined by the exchange energy. These findings open up novel opportunities for fundamental research on the role of short-wavelength spin excitations in magnetism and high-temperature superconductivity, since they provide a macroscopic probe of the femtosecond dynamics of sub-nanometer spin-spin correlations and, ultimately, of the exchange energy. With this approach it becomes possible to trace the dynamics of such short-range magnetic correlations for instance during phase transitions. Moreover, our work suggests that nanospintronics and nanomagnonics can employ phase-controllable spin waves with frequencies in the 20 THz domain.

References in corpus (3)

• Disentangling the electronic and phononic glue in a high-Tc superconductor
• Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates
• Non-equilibrium magnetic interactions in strongly correlated systems

Cited by in corpus (55)

• Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• An Introduction to Spin Wave Computing
• Reconfigurable nano-scale spin-wave directional coupler
• Coherent spin-wave transport in an antiferromagnet
• Femtosecond formation dynamics of the spin Seebeck effect revealed by terahertz spectroscopy
• Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals
• Optical determination of the Neel vector in a CuMnAs thin-film antiferromagnet
• Raman fingerprint of two terahertz spin wave branches in a two-dimensional honeycomb Ising ferromagnet
• Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
• Phono-magnetic analogs to opto-magnetic effects
• Perspective on Metallic Antiferromagnets
• Competing spin transfer and dissipation at Co/Cu(001) interfaces on femtosecond timescales
• Manipulating magnetism by ultrafast control of the exchange interaction
• Optical manipulation of a magnon-photon hybrid system
• Laser-driven quantum magnonics and THz dynamics of the order parameter in antiferromagnets
• Spin Dynamics in van der Waals Magnetic Systems
• Frequency and wavenumber selective excitation of spin waves through coherent energy transfer from elastic waves
• Electron Thermalization and Relaxation in Laser-Heated Nickel by Few-Femtosecond Core-Level Transient Absorption Spectroscopy
• Investigating ultrafast quantum magnetism with machine learning
• Excitation of magnon accumulation by laser clocking as a source of long-range spin waves in transparent magnetic films
• Achieving Strong Magnon Blockade through Magnon Squeezing in a Cavity Magnetomechanical System
• Sum-frequency excitation of coherent magnons
• Positive-Negative Birefringence in Multiferroic Layered Metasurfaces
• Anomalous phase shift in a Josephson junction via an antiferromagnetic interlayer
• Measurement of 10 fs pulses across the entire Visible to Near-Infrared Spectral Range
• Femtosecond phononic coupling to both spins and charges in a room temperature antiferromagnetic semiconductor
• Femtosecond laser pulse driven caustic spin wave beams
• Dynamical properties of a driven dissipative dimerized $S=1/2$ chain
• The importance of the interface for picosecond spin pumping in antiferromagnet-heavy metal heterostructures
• Optical excitation of propagating magnetostatic waves in an epitaxial Galfenol film by an ultrafast magnetic anisotropy change
• Supermagnonic propagation in two-dimensional antiferromagnets
• Excitation of multiple phonon modes in copper metaborate CuB${}_2$O${}_4$ via non-resonant impulsive stimulated Raman scattering
• Resonant optical control of the structural distortions that drive ultrafast demagnetization in Cr${}_2$O${}_3$
• Probing ultrafast spin dynamics in the antiferromagnetic multiferroic HoMnO${}_3$ through a magnon resonance
• Optical control of competing exchange interactions and coherent spin-charge coupling in two-orbital Mott insulators
• Laser-induced THz magnetism of antiferromagnetic CoF${}_2$
• Coherent THz Spin Dynamics in Antiferromagnets Beyond the Approximation of the Néel vector
• Sustained coherent spin wave emission using frequency combs
• Excitation and coherent control of magnetization dynamics in magnetic tunnel junctions using acoustic pulses
• Experimental determination of exchange constants in antiferromagnetic Mn${}_2$Au
• Double-Exchange Enhanced Magnetic Blue-Shift of Mott Gaps
• Selection rules for ultrafast laser excitation and detection of spin correlations dynamics in a cubic antiferromagnet
• Phase-resolved Spin-Wave Tomography
• Parametrically driven THz magnon-pairs: predictions towards ultimately fast and minimally dissipative switching
• Control of magnons via ultrafast magnetization modulation
• Simplified approach to the magnetic blue shift of Mott gaps
• Femtosecond laser comb driven perpendicular standing spin waves
• Spontaneous and impulsive stimulated Raman scattering from two-magnon modes in a cubic antiferromagnet
• Spin-rotation mode in a quantum Hall ferromagnet
• Photoengineering the Magnon Spectrum in an Insulating Antiferromagnet
• Time-dependent Schwinger boson mean-field theory of supermagnonic propagation in 2D antiferromagnets
• Sub-nanosecond heat-based logic, writing and reset in an antiferromagnetic magnetoresistive memory
• Role of magnon-magnon interaction in optical excitation of coherent two-magnon modes
• Lattice-driven femtosecond magnon dynamics in $\alpha$-MnTe
• Ultrafast amplification and non-linear magneto-elastic coupling of coherent magnon modes in an antiferromagnet