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Beatrice Ruta
Researcher at Claude Bernard University Lyon 1
Publications - 66
Citations - 2142
Beatrice Ruta is an academic researcher from Claude Bernard University Lyon 1. The author has contributed to research in topics: Glass transition & Amorphous metal. The author has an hindex of 21, co-authored 60 publications receiving 1657 citations. Previous affiliations of Beatrice Ruta include European Synchrotron Radiation Facility & University of Lyon.
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Atomic-scale relaxation dynamics and aging in a metallic glass probed by x-ray photon correlation spectroscopy.
Beatrice Ruta,Yuriy Chushkin,Giulio Monaco,Luca Cipelletti,Luca Cipelletti,Eloi Pineda,Pere Bruna,Valentina M. Giordano,M. Gonzalez-Silveira +8 more
TL;DR: In this article, the structural relaxation process in a metallic glass on the atomic length scale was investigated using x-ray photon correlation spectroscopy, and the authors found evidence for a crossover between the supercooled liquid phase and the metastable glassy state, suggesting different origins of the relaxation process across the transition.
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Sound Attenuation at Terahertz Frequencies and the Boson Peak of Vitreous Silica
TL;DR: This finding solves a recent controversy concerning the location of this crossover in vitreous silica, clarifying that it occurs at the position of the glass-characteristic excess of vibrational modes known as boson peak, and thus establishing a direct connection between bosonpeak and acoustic dispersion curves.
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Relaxation processes and physical aging in metallic glasses.
TL;DR: An overview of the current state of the art in the experimental advances probing physical aging and relaxation processes in metallic glasses is presented, and particular emphasis is put on the occurrence of distinct relaxation processes beyond the main structural process in viscous metallic melts and their fate upon entering the glassy state.
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X-Ray Photon Correlation Spectroscopy Reveals Intermittent Aging Dynamics in a Metallic Glass.
Zach Evenson,Zach Evenson,Beatrice Ruta,Simon Hechler,Moritz Stolpe,Eloi Pineda,Isabella Gallino,Ralf Busch +7 more
TL;DR: It is shown that the structural relaxation processes underlying aging in this metallic glass are intermittent and highly heterogeneous at the atomic scale, and physical aging is triggered by cooperative atomic rearrangements, driven by the relaxation of internal stresses.
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Revealing the fast atomic motion of network glasses
Beatrice Ruta,Giacomo Baldi,Yuriy Chushkin,Benoit Ruffle,Luigi Cristofolini,Adriano Fontana,Marco Zanatta,Francesco Nazzani +7 more
TL;DR: Following the evolution of the structural relaxation in a sodium silicate glass, it is found that this fast dynamics is accompanied by the absence of any detectable aging, suggesting a decoupling of the relaxation time and the viscosity in the glass.