Stress Relaxation above and below the Jamming Transition

Kuniyasu Saitoh, Takahiro Hatano, Atsushi Ikeda, Brian P. Tighe

Research output: Contribution to journalArticlepeer-review

Abstract

We numerically investigate stress relaxation in soft athermal disks to reveal critical slowing down when the system approaches the jamming point. The exponents describing the divergence of the relaxation time differ dramatically depending on whether the transition is approached from the jammed or unjammed phase. This contrasts sharply with conventional dynamic critical scaling scenarios, where a single exponent characterizes both sides. We explain this surprising difference in terms of the vibrational density of states, which is a key ingredient of linear viscoelastic theory. The vibrational density of states exhibits an extra slow mode that emerges below jamming, which we utilize to demonstrate the anomalous exponent below jamming.

Original languageEnglish
Article number118001
JournalPhysical review letters
Volume124
Issue number11
DOIs
Publication statusPublished - 2020 Mar 20

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Stress Relaxation above and below the Jamming Transition'. Together they form a unique fingerprint.

Cite this