Non-equilibrium dynamics of spin-lattice coupling
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866929288222081024 |
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| author | Ueda, Hiroki Mankowsky, Roman Paris, Eugenio Sander, Mathias Deng, Yunpei Liu, Biaolong Leroy, Ludmila Nag, Abhishek Skoropata, Elizabeth Ukleev, Chennan Wang Victor Perren, Gérard Sylvester Dössegger, Janine Gurung, Sabina Abreu, Elsa Savoini, Matteo Kimura, Tsuyoshi Patthey, Luc Razzoli, Elia Lemke, Henrik Till Johnson, Steven Lee Staub, Urs |
| author_facet | Ueda, Hiroki Mankowsky, Roman Paris, Eugenio Sander, Mathias Deng, Yunpei Liu, Biaolong Leroy, Ludmila Nag, Abhishek Skoropata, Elizabeth Ukleev, Chennan Wang Victor Perren, Gérard Sylvester Dössegger, Janine Gurung, Sabina Abreu, Elsa Savoini, Matteo Kimura, Tsuyoshi Patthey, Luc Razzoli, Elia Lemke, Henrik Till Johnson, Steven Lee Staub, Urs |
| contents | Interactions between the different degrees of freedom form the basis of many manifestations of intriguing physics in condensed matter. In this respect, quantifying the dynamics of normal modes that themselves arise from these interactions and how they interact with other excitations is of central importance. Of the different types of coupling that are often important, spin-lattice coupling is relevant to several sub-fields of condensed matter physics; examples include spintronics, high-TC superconductivity, and topological materials. While theories of materials where spin-lattice coupling is relevant can sometimes be used to infer the magnitude and character of this interaction, experimental approaches that can directly measure it are rare and incomplete. Here we use time-resolved X-ray diffraction to directly access the spin-lattice coupling by measuring both ultrafast atomic motion and the associated spin dynamics following the excitation of a coherent electromagnon by an intense THz pulse in a multiferroic hexaferrite. Comparing the dynamics of the two different components, one striking outcome is the different phase shifts relative to the driving field. 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 correlated electron physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_02676 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Non-equilibrium dynamics of spin-lattice coupling Ueda, Hiroki Mankowsky, Roman Paris, Eugenio Sander, Mathias Deng, Yunpei Liu, Biaolong Leroy, Ludmila Nag, Abhishek Skoropata, Elizabeth Ukleev, Chennan Wang Victor Perren, Gérard Sylvester Dössegger, Janine Gurung, Sabina Abreu, Elsa Savoini, Matteo Kimura, Tsuyoshi Patthey, Luc Razzoli, Elia Lemke, Henrik Till Johnson, Steven Lee Staub, Urs Strongly Correlated Electrons Interactions between the different degrees of freedom form the basis of many manifestations of intriguing physics in condensed matter. In this respect, quantifying the dynamics of normal modes that themselves arise from these interactions and how they interact with other excitations is of central importance. Of the different types of coupling that are often important, spin-lattice coupling is relevant to several sub-fields of condensed matter physics; examples include spintronics, high-TC superconductivity, and topological materials. While theories of materials where spin-lattice coupling is relevant can sometimes be used to infer the magnitude and character of this interaction, experimental approaches that can directly measure it are rare and incomplete. Here we use time-resolved X-ray diffraction to directly access the spin-lattice coupling by measuring both ultrafast atomic motion and the associated spin dynamics following the excitation of a coherent electromagnon by an intense THz pulse in a multiferroic hexaferrite. Comparing the dynamics of the two different components, one striking outcome is the different phase shifts relative to the driving field. 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 correlated electron physics. |
| title | Non-equilibrium dynamics of spin-lattice coupling |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2306.02676 |