Non-equilibrium dynamics of spin-lattice coupling

Hiroki Ueda (), Roman Mankowsky, Eugenio Paris, Mathias Sander, Yunpei Deng, Biaolong Liu, Ludmila Leroy, Abhishek Nag, Elizabeth Skoropata, Chennan Wang, Victor Ukleev, Gérard Sylvester Perren, Janine Dössegger, Sabina Gurung, Cristian Svetina, Elsa Abreu, Matteo Savoini, Tsuyoshi Kimura, Luc Patthey, Elia Razzoli, Henrik Till Lemke, Steven Lee Johnson and Urs Staub ()
Additional contact information
Hiroki Ueda: Paul Scherrer Institute
Roman Mankowsky: Paul Scherrer Institute
Eugenio Paris: Paul Scherrer Institute
Mathias Sander: Paul Scherrer Institute
Yunpei Deng: Paul Scherrer Institute
Biaolong Liu: Paul Scherrer Institute
Ludmila Leroy: Paul Scherrer Institute
Abhishek Nag: Paul Scherrer Institute
Elizabeth Skoropata: Paul Scherrer Institute
Chennan Wang: Université de Fribourg
Victor Ukleev: Paul Scherrer Institute
Gérard Sylvester Perren: Paul Scherrer Institute
Janine Dössegger: ETH Zurich
Sabina Gurung: ETH Zurich
Cristian Svetina: Paul Scherrer Institute
Elsa Abreu: ETH Zurich
Matteo Savoini: ETH Zurich
Tsuyoshi Kimura: University of Tokyo
Luc Patthey: Paul Scherrer Institute
Elia Razzoli: Paul Scherrer Institute
Henrik Till Lemke: Paul Scherrer Institute
Steven Lee Johnson: Paul Scherrer Institute
Urs Staub: Paul Scherrer Institute

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: 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.

Date: 2023
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DOI: 10.1038/s41467-023-43581-9

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