A link between anomalous viscous loss and the boson peak in soft jammed solids

Yusuke Hara, Ryosuke Matsuoka, Hiroyuki Ebata, Daisuke Mizuno, Atsushi Ikeda

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

Understanding the mechanical properties of soft jammed solids that consist of densely packed particles, such as foams and emulsions, requires insights into the microscopic origins of linear viscoelasticity—how a solid responds to an infinitesimal deformation. Here we perform microrheology experiments on concentrated emulsions and measure the storage and loss moduli for a wide range of frequencies. We applied a linear response formalism for microrheology to a soft sphere model that undergoes the jamming transition. We find that the theory quantitatively explains the experiments. Our analysis reveals that the anomalous viscous loss seen in emulsions results from the boson peak, which is a universal vibrational property of amorphous solids and reflects the marginal stability in soft jammed solids. We show that the anomalous viscous loss is universal in systems with various interparticle interactions as it stems from the universal boson peak; it even survives below the jamming density at which thermal fluctuation is pronounced and the dynamics becomes inherently nonlinear.

本文言語英語
論文番号15143
ページ(範囲)262-268
ページ数7
ジャーナルNature Physics
21
2
DOI
出版ステータス出版済み - 2月 2025

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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