Vibrational density of states in the disordered solid using classical density functional model

Leishangthem, Premkumar ; Das, Shankar P. (2015) Vibrational density of states in the disordered solid using classical density functional model Physics Letters A, 379 (16-17). pp. 1073-1080. ISSN 0375-9601

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physleta.2015.01.022

Abstract

The inhomogeneous density n(x) of an amorphous solid is expressed as a sum of Gaussian profiles. Average width of these profiles represents a characteristic length l signifying the degree of mass localization in the system. We demonstrate that as l spreads beyond a critical value l0, the corresponding vibrational density of states g(ω) deviates from the Debye form gD(ω). We estimate the g(ω) assuming a single peak form similar to the boson peak. For a hard core system of diameter σ we obtain l0≈0.2σ. At an optimum l=lh the boson peak height hB of g(ω) reaches a maximum.

Item Type:Article
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ID Code:99417
Deposited On:26 Jul 2016 11:37
Last Modified:26 Jul 2016 11:37

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