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Ultrafast entropy production in pump-probe experiments

Author

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  • Lorenzo Caprini

    (Heinrich-Heine-Universität Düsseldorf)

  • Hartmut Löwen

    (Heinrich-Heine-Universität Düsseldorf)

  • R. Matthias Geilhufe

    (Chalmers University of Technology)

Abstract

The ultrafast control of materials has opened the possibility to investigate non-equilibrium states of matter with striking properties, such as transient superconductivity and ferroelectricity, ultrafast magnetization and demagnetization, as well as Floquet engineering. The characterization of the ultrafast thermodynamic properties within the material is key for their control and design. Here, we develop the ultrafast stochastic thermodynamics for laser-excited phonons. We calculate the entropy production and heat absorbed from experimental data for single phonon modes of driven materials from time-resolved X-ray scattering experiments where the crystal is excited by a laser pulse. The spectral entropy production is calculated for SrTiO3 and KTaO3 for different temperatures and reveals a striking relation with the power spectrum of the displacement-displacement correlation function by inducing a broad peak beside the eigenmode-resonance.

Suggested Citation

  • Lorenzo Caprini & Hartmut Löwen & R. Matthias Geilhufe, 2024. "Ultrafast entropy production in pump-probe experiments," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-44277-w
    DOI: 10.1038/s41467-023-44277-w
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    References listed on IDEAS

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    1. R. Mankowsky & A. Subedi & M. Först & S. O. Mariager & M. Chollet & H. T. Lemke & J. S. Robinson & J. M. Glownia & M. P. Minitti & A. Frano & M. Fechner & N. A. Spaldin & T. Loew & B. Keimer & A. Geor, 2014. "Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5," Nature, Nature, vol. 516(7529), pages 71-73, December.
    2. Ye Tian & Fan Yang & Chaoyu Guo & Ying Jiang, 2018. "Recent Advances In Ultrafast Time-Resolved Scanning Tunneling Microscopy," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 25(Supp01), pages 1-19, December.
    3. A. von Hoegen & R. Mankowsky & M. Fechner & M. Först & A. Cavalleri, 2018. "Probing the interatomic potential of solids with strong-field nonlinear phononics," Nature, Nature, vol. 555(7694), pages 79-82, March.
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