Nonlinear Ultrafast Spin Scattering in the Skyrmion Phase of 
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Langner, M. C.; Roy, Sujoy; Huang, Shih Wen; Koralek, Jake; Chuang, Yi‐De; Dakovski, Georgi L.; Turner, J. E.; Robinson, Joseph S.; Coffee, Ryan; Minitti, Michael P.; Seki, Shu; Tokura, Y.; Schoenlein, R. W.

doi:10.1103/physrevlett.119.107204

Cited by 15 publications

(12 citation statements)

References 30 publications

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“…The SW transfer at t = 0 ps and t = 1.5 ps amounts to about 15% to 30% respectively of the SW transfer at late time-delays t. This evidences an efficient ultrafast spin disordering mechanism, in agreement with the observations described in Ref. 12. Similar dynamics is observed for the ∆S z = − 1 excitation.…”

supporting

confidence: 90%

Coupled dynamics of long-range and cluster-internal spin order in the cluster Mott insulator Cu2OSeO3

et al. 2019

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Cu4 triplet clusters form the relevant spin entity for the formation of long-range magnetic order in the cluster magnet Cu2OSeO3. Using time-resolved Raman spectroscopy, we probed photoinduced spin and lattice dynamics in this Mott insulator. Multiple ps-decade spin-lattice relaxation dynamics is observed, evidencing a separation of the order parameter dynamics into disordering of long-range and internal spin cluster order. Our study exemplifies the double order parameter dynamics of generalized molecular crystals of charge, spin, and orbital nature.

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supporting

confidence: 90%

Coupled dynamics of long-range and cluster-internal spin order in the cluster Mott insulator Cu2OSeO3

et al. 2019

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“…In multiferroic materials (anti-)ferromagnetic order and ferroelectricity coexist and interact by magnetoelectric coupling [92][93][94] 98 This material shows a complex phase diagram, with a rich number of competing phases that exhibit different magnetic structure, 99 where the application of an external magnetic field to the conical phase creates a skyrmion phase.…”

Section: Charge Orbital Spin and Lattice Dynamics In Complex Oxidesmentioning

confidence: 99%

Probing dynamics in quantum materials with femtosecond X-rays

et al. 2018

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Optical pulses are routinely used to drive dynamical changes in the properties of solids. In quantum materials, many new phenomena have been discovered, including ultrafast transitions between electronic phases, switching of ferroic orders and nonequilibrium emergent behaviors such as photo-induced superconductivity.Understanding the underlying non-equilibrium physics requires detailed measurements of multiple microscopic degrees of freedom at ultrafast time resolution. Femtosecond x-rays are key to this endeavor, as they can access the dynamics of structural, electronic and magnetic degrees of freedom. Here, we cover a series of representative experimental studies in which ultrashort x-ray pulses from free electron lasers have been used, opening up new horizons for materials research.

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“…The cubic copper(II)-oxoselenite Cu 2 OSeO 3 is a multiferroic ferrimagnet with a chiral crystal structure that came under the focus of recent attention owing to the emergence of skyrmion order in this material [30][31][32][33][34]. Its crystal structure is cubic (space group P2 1 3) with the lattice constant a = 8.925 Å [35].…”

Section: Introductionmentioning

confidence: 99%

Magnonic Weyl states in Cu2OSeO3

Zhang¹,

Onykiienko²,

Buhl³

et al. 2020

Phys. Rev. Research

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The multiferroic ferrimagnet Cu 2 OSeO 3 with a chiral crystal structure attracted a lot of recent attention due to the emergence of magnetic skyrmion order in this material. Here, the topological properties of its magnon excitations are systematically investigated by linear spin-wave theory and inelastic neutron scattering. When considering Heisenberg exchange interactions only, two degenerate Weyl magnon nodes with topological charges ±2 are observed at high-symmetry points. Each Weyl point splits into two as the symmetry of the system is further reduced by including into consideration the nearest-neighbor Dzyaloshinsky-Moriya interaction, crucial for obtaining an accurate fit to the experimental spin-wave spectrum. The predicted topological properties are verified by surface state and Chern number analysis. Additionally, we predict that a measurable thermal Hall conductivity can be associated with the emergence of the Weyl points, the position of which can be tuned by changing the crystal symmetry of the material.

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Nonlinear Ultrafast Spin Scattering in the Skyrmion Phase of Cu2OSeO3

Cited by 15 publications

References 30 publications

Coupled dynamics of long-range and cluster-internal spin order in the cluster Mott insulator Cu2OSeO3

Coupled dynamics of long-range and cluster-internal spin order in the cluster Mott insulator Cu2OSeO3

Probing dynamics in quantum materials with femtosecond X-rays

Magnonic Weyl states in Cu2OSeO3

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