Vibrational Modes Identify Soft Spots in a Sheared Disordered Packing

被引：352

作者：

Manning, M. L. ^{[1
,2
]}

Liu, A. J. ^{[3
]}

机构：

[1] Princeton Ctr Theoret Sci, Princeton, NJ 08544 USA

[2] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[3] Univ Penn, Dept Phys, Philadelphia, PA 19130 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 10期

关键词：

REARRANGEMENTS; DYNAMICS;

D O I：

10.1103/PhysRevLett.107.108302

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We analyze low-frequency vibrational modes in a two-dimensional, zero-temperature, quasistatically sheared model glass to identify a population of structural "soft spots'' where particle rearrangements are initiated. The population of spots evolves slowly compared to the interval between particle rearrangements, and the soft spots are structurally different from the rest of the system. Our results suggest that disordered solids flow via localized rearrangements that tend to occur at soft spots, which are analogous to dislocations in crystalline solids.

引用

页数：4

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