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サイトウ クニヤス
Kuniyasu Saitoh
齊藤 国靖 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2020/03 |
| 形態種別 | 研究論文 |
| 標題 | Stress Relaxation above and below the Jamming Transition |
| 執筆形態 | その他 |
| 掲載誌名 | Physical Review Letters |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 124(11) |
| 著者・共著者 | Kuniyasu Saitoh,Takahiro Hatano,Atsushi Ikeda,Brian P. Tighe |
| 概要 | 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. |
| DOI | 10.1103/PhysRevLett.124.118001 |
| ISSN | 0031-9007/1079-7114 |