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Athermal Fluctuations in Disordered Crystals by Pappu Acharya; Surajit Sengupta; Bulbul Chakraborty; Kabir Ramola is a Physics and Astronomy article available to read on EtoBox.

What is Athermal Fluctuations in Disordered Crystals about?

We analyze the fluctuations in particle positions and interparticle forces in disordered crystals composed of jammed soft particles in the limit of weak disorder. We demonstrate that such athermal systems are fundamentally different from their thermal counterparts, characterized by constrained fluctuations of forces perpendicular to the lattice directions. We develop a disorder perturbation expansion in polydispersity about the crystalline state, which we use to derive exact results to linear order. We show that constrained fluctuations result as a consequence of local force balance conditions, and are characterized by non-Gaussian distributions, which we derive exactly. We analytically predict several properties of such systems, including the scaling of the average coordination with polydispersity and packing fraction, which we verify with numerical simulations using soft disks with one-sided harmonic interactions.

Who reads Athermal Fluctuations in Disordered Crystals?

Author

Pappu Acharya; Surajit Sengupta; Bulbul Chakraborty; Kabir Ramola

Publisher

The American Physical Society; American Physical Society; American Physical Society (APS) (ISSN 0031-9007)

Published

2020

Language

EN

Field

Physics and Astronomy (Physical Sciences)