IDEAS home Printed from https://ideas.repec.org/a/nat/natcom/v15y2024i1d10.1038_s41467-024-46981-7.html
   My bibliography  Save this article

The nature of non-phononic excitations in disordered systems

Author

Listed:
  • Walter Schirmacher

    (Universität Mainz
    Istituto Italiano di Tecnologia)

  • Matteo Paoluzzi

    (Istituto per le Applicazioni del Calcolo del Consiglio Nazionale delle Ricerche
    Universitat de Barcelona
    Universita’ di Roma “La Sapienza”)

  • Felix Cosmin Mocanu

    (Univ. of Oxford
    Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité)

  • Dmytro Khomenko

    (Universita’ di Roma “La Sapienza”)

  • Grzegorz Szamel

    (Colorado State University)

  • Francesco Zamponi

    (Universita’ di Roma “La Sapienza”
    Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité)

  • Giancarlo Ruocco

    (Istituto Italiano di Tecnologia
    Universita’ di Roma “La Sapienza”)

Abstract

The frequency scaling exponent of low-frequency excitations in microscopically small glasses, which do not allow for the existence of waves (phonons), has been in the focus of the recent literature. The density of states g(ω) of these modes obeys an ωs scaling, where the exponent s, ranging between 2 and 5, depends on the quenching protocol. The orgin of these findings remains controversal. Here we show, using heterogeneous-elasticity theory, that in a marginally-stable glass sample g(ω) follows a Debye-like scaling (s = 2), and the associated excitations (type-I) are of random-matrix type. Further, using a generalisation of the theory, we demonstrate that in more stable samples, other, (type-II) excitations prevail, which are non-irrotational oscillations, associated with local frozen-in stresses. The corresponding frequency scaling exponent s is governed by the statistics of small values of the stresses and, therefore, depends on the details of the interaction potential.

Suggested Citation

  • Walter Schirmacher & Matteo Paoluzzi & Felix Cosmin Mocanu & Dmytro Khomenko & Grzegorz Szamel & Francesco Zamponi & Giancarlo Ruocco, 2024. "The nature of non-phononic excitations in disordered systems," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46981-7
    DOI: 10.1038/s41467-024-46981-7
    as

    Download full text from publisher

    File URL: https://www.nature.com/articles/s41467-024-46981-7
    File Function: Abstract
    Download Restriction: no
    File URL: https://libkey.io/10.1038/s41467-024-46981-7?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    References listed on IDEAS

    as
    1. Camille Scalliet & Ludovic Berthier & Francesco Zamponi, 2019. "Nature of excitations and defects in structural glasses," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    2. T. S. Grigera & V. Martín-Mayor & G. Parisi & P. Verrocchio, 2003. "Phonon interpretation of the ‘boson peak’ in supercooled liquids," Nature, Nature, vol. 422(6929), pages 289-292, March.
    3. Lijin Wang & Andrea Ninarello & Pengfei Guan & Ludovic Berthier & Grzegorz Szamel & Elijah Flenner, 2019. "Low-frequency vibrational modes of stable glasses," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Ding Xu & Shiyun Zhang & Hua Tong & Lijin Wang & Ning Xu, 2024. "Low-frequency vibrational density of states of ordinary and ultra-stable glasses," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Levke Ortlieb & Trond S. Ingebrigtsen & James E. Hallett & Francesco Turci & C. Patrick Royall, 2023. "Probing excitations and cooperatively rearranging regions in deeply supercooled liquids," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46981-7. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.