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Ripples in the bottom of the potential energy landscape of metallic glass

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Listed:
  • Leo Zella

    (The University of Tennessee)

  • Jaeyun Moon

    (Materials Science and Technology Division, Oak Ridge National Laboratory
    Cornell University)

  • Takeshi Egami

    (The University of Tennessee
    Materials Science and Technology Division, Oak Ridge National Laboratory
    The University of Tennessee)

Abstract

In the absence of periodicity, the structure of glass is ill-defined, and a large number of structural states are found at similar energy levels. However, little is known about how these states are connected to each other in the potential energy landscape. We simulate mechanical relaxation by molecular dynamics for a prototypical $${{{\rm{C}}}}{{{{\rm{u}}}}}_{64.5}{{{\rm{Z}}}}{{{{\rm{r}}}}}_{35.5}$$ C u 64.5 Z r 35.5 metallic glass and follow the mechanical energy loss of each atom to track the change in the state. We find that the energy barriers separating these states are remarkably low, only of the order of 1 meV, implying that even quantum fluctuations can overcome these potential energy barriers. Our observation of numerous small ripples in the bottom of the potential energy landscape puts many assumptions regarding the thermodynamic states of metallic glasses into question and suggests that metallic glasses are not totally frozen at the local atomic level.

Suggested Citation

  • Leo Zella & Jaeyun Moon & Takeshi Egami, 2024. "Ripples in the bottom of the potential energy landscape of metallic glass," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45640-1
    DOI: 10.1038/s41467-024-45640-1
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    References listed on IDEAS

    as
    1. Patrick Charbonneau & Jorge Kurchan & Giorgio Parisi & Pierfrancesco Urbani & Francesco Zamponi, 2014. "Fractal free energy landscapes in structural glasses," Nature Communications, Nature, vol. 5(1), pages 1-6, September.
    2. W. Dmowski & S. O. Diallo & K. Lokshin & G. Ehlers & G. Ferré & J. Boronat & T. Egami, 2017. "Observation of dynamic atom-atom correlation in liquid helium in real space," Nature Communications, Nature, vol. 8(1), pages 1-6, August.
    3. Yue Fan & Takuya Iwashita & Takeshi Egami, 2017. "Energy landscape-driven non-equilibrium evolution of inherent structure in disordered material," Nature Communications, Nature, vol. 8(1), pages 1-7, August.
    4. Pablo G. Debenedetti & Frank H. Stillinger, 2001. "Supercooled liquids and the glass transition," Nature, Nature, vol. 410(6825), pages 259-267, March.
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