Non-equilibrium dynamics of spin-lattice coupling
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Date
2023
Publication Type
Journal Article
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Abstract
Quantifying the dynamics of normal modes and how they interact with
other excitations is of central importance in condensed matter. Spin-lattice
coupling is relevant to several sub-fields of condensed matter physics;
examples include spintronics, high-Tc superconductivity, and topological
materials. However, experimental approaches that can directly measure it
are rare and incomplete. Here we use time-resolved X-ray diffraction to
directly access the ultrafast motion of atoms and spins following the
coherent excitation of an electromagnon in a multiferroic hexaferrite. One
striking outcome is the different phase shifts relative to the driving field of
the two different components. This phase shift provides insight into the
excitation process of such a coupled mode. This direct observation of
combined lattice and magnetization dynamics paves the way to access the
mode-selective spin-lattice coupling strength, which remains a missing
fundamental parameter for ultrafast control of magnetism and is relevant
to a wide variety of materials.
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published
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Journal / series
Volume
14 (1)
Pages / Article No.
7778
Publisher
Nature
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Organisational unit
03920 - Johnson, Steven / Johnson, Steven
09814 - Abreu, Elsa / Abreu, Elsa
Notes
Funding
801459 - Fellowship Program of the NCCR MUST (National Competence Center for Research in Molecular Ultrafast Science and Technology) and the Cluster of Excellence RESOLV (EC)
169698 - Nonlinear phononic control over transition metal perovskites and interfaces (SNF)
179691 - Exploring superconductivity pathways in low dimensional spin-ladder and spin-chain compounds (SNF)
169698 - Nonlinear phononic control over transition metal perovskites and interfaces (SNF)
179691 - Exploring superconductivity pathways in low dimensional spin-ladder and spin-chain compounds (SNF)