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Liquid-like versus stress-driven dynamics in a metallic glass former observed by temperature scanning X-ray photon correlation spectroscopy

Maximilian Frey (), Nico Neuber, Sascha Sebastian Riegler, Antoine Cornet, Yuriy Chushkin, Federico Zontone, Lucas Matthias Ruschel, Bastian Adam, Mehran Nabahat, Fan Yang, Jie Shen, Fabian Westermeier, Michael Sprung, Daniele Cangialosi, Valerio Lisio, Isabella Gallino, Ralf Busch, Beatrice Ruta and Eloi Pineda
Additional contact information
Maximilian Frey: Saarland University
Nico Neuber: Saarland University
Sascha Sebastian Riegler: Saarland University
Antoine Cornet: Université Grenoble Alpes and Centre National de la Recherche Scientifique
Yuriy Chushkin: European Synchrotron Radiation Facility
Federico Zontone: European Synchrotron Radiation Facility
Lucas Matthias Ruschel: Saarland University
Bastian Adam: Saarland University
Mehran Nabahat: Universitat Politècnica de Catalunya—BarcelonaTech
Fan Yang: Deutsches Zentrum für Luft- und Raumfahrt (DLR)
Jie Shen: Université Grenoble Alpes and Centre National de la Recherche Scientifique
Fabian Westermeier: Deutsches Elektronen-Synchrotron DESY
Michael Sprung: Deutsches Elektronen-Synchrotron DESY
Daniele Cangialosi: Donostia International Physics Center
Valerio Lisio: Donostia International Physics Center
Isabella Gallino: Technical University of Berlin
Ralf Busch: Saarland University
Beatrice Ruta: Université Grenoble Alpes and Centre National de la Recherche Scientifique
Eloi Pineda: Universitat Politècnica de Catalunya—BarcelonaTech

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Since several decades, the dynamics and vitrification kinetics of supercooled liquids are the subject of active research in science and engineering. Profiting from modern detector technology and highly brilliant fourth-generation synchrotron radiation, we apply temperature scanning X-ray photon correlation spectroscopy (XPCS) to probe the dynamics of a Pt-based metallic glass former in the glass, glass transition region, and supercooled liquid, covering up to six orders of magnitude in timescales. Our data demonstrates that the structural α-relaxation process is still observable in the glass, although it is partially masked by a faster source of decorrelation observed at atomic scale. We present an approach that interprets these findings as the superposition of heterogeneous liquid-like and stress-driven ballistic-like atomic motions. This work not only extends the dynamical range probed by standard isothermal XPCS but also adds a different view on the α-relaxation across the glass transition and provides insights into the anomalous, compressed temporal decay of the density-density correlation functions observed in metallic glasses and many out-of-equilibrium soft materials.

Date: 2025
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DOI: 10.1038/s41467-025-59767-2

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