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It is now established that glasses feature low-frequency, nonphononic excitations, in addition to phonons that follow Debye's vibrational density of state (VDoS). Extensive computer studies demonstrated that these nonphononic, glassy excitations foll
Externí odkaz:
http://arxiv.org/abs/2404.16996
Publikováno v:
The Journal of Chemical Physics 161, 014504 (2024)
In addition to Goldstone phonons that generically emerge in the low-frequency vibrational spectrum of any solid, crystalline or glassy, structural glasses also feature other low-frequency vibrational modes. The nature and statistical properties of th
Externí odkaz:
http://arxiv.org/abs/2404.12735
Publikováno v:
Physical Review Research 6, 023167 (2024)
Materials typically fail under complex stress states, essentially involving dilatational (volumetric) components that eventually lead to material decohesion/separation. It is therefore important to understand dilatational irreversible deformation --
Externí odkaz:
http://arxiv.org/abs/2402.03044
Autor:
Saporta-Katz, Ori, Moriel, Avraham
Various physical systems relax mechanical frustration through configurational rearrangements. We examine such rearrangements via Hamiltonian dynamics of simple internally-stressed harmonic 4-mass systems. We demonstrate theoretically and numerically
Externí odkaz:
http://arxiv.org/abs/2311.02982
Publikováno v:
Physical Review Research 6, 023053 (2024)
A hallmark of glasses is an excess of low-frequency, nonphononic vibrations, in addition to phonons. It is associated with the intrinsically nonequilibrium and disordered nature of glasses, and is generically manifested as a THz peak -- the boson pea
Externí odkaz:
http://arxiv.org/abs/2304.03661
Autor:
Moriel, Avraham
Publikováno v:
Phys. Rev. Lett. 126, 088004 (2021)
Glasses, unlike their crystalline counterparts, exhibit low-frequency nonphononic excitations whose frequencies $\omega$ follow a universal $\mathcal{D}\!\left(\omega\right)\!\sim\!\omega^4$ density of states. The process of glass formation generates
Externí odkaz:
http://arxiv.org/abs/2010.05536
Publikováno v:
Phys. Rev. E 102, 033008 (2020)
Low-frequency nonphononic modes and plastic rearrangements in glasses are spatially quasilocalized, i.e. feature a disorder-induced short-range core and known long-range decaying elastic fields. Extracting the unknown short-range core properties, pot
Externí odkaz:
http://arxiv.org/abs/2007.11421
Autor:
Moriel, Avraham, Kapteijns, Geert, Rainone, Corrado, Zylberg, Jacques, Lerner, Edan, Bouchbinder, Eran
Publikováno v:
The Journal of Chemical Physics 151, 104503 (2019)
The attenuation of long-wavelength phonons (waves) by glassy disorder plays a central role in various glass anomalies, yet it is neither fully characterized, nor fully understood. Of particular importance is the scaling of the attenuation rate $\Gamm
Externí odkaz:
http://arxiv.org/abs/1905.03378
In this brief note we comment on the recent results presented in arXiv:1812.08736v1
Externí odkaz:
http://arxiv.org/abs/1902.06225
Autor:
Moriel, Avraham, Bouchbinder, Eran
Publikováno v:
Phys. Rev. Materials 2, 073602 (2018)
Necking instabilities, in which tensile (extensional) deformation localizes into a small spatial region, are generic failure modes in elasto-viscoplastic materials. Materials in this very broad class --- including amorphous, crystalline, polycrystall
Externí odkaz:
http://arxiv.org/abs/1804.04369