Effect of external Gaussian random field on phonon spectrum of linear atomic chains

Document Type

Article

Publication Date

5-1-2004

Abstract

We present the theoretical study of the effect of external random field characterized by a Gaussian probability distribution function on the continuous phonon spectrum of one-dimensional (1D) chain, based on the Jacobian matrix method. The cumulative effect of the random field and simple isotopic defect is studied analytically and numerically. The Gaussian random field removes a square-root divergence appearing in the phonon spectrum of ideal 1D chain. The impurity phonon DOS shows strong dependence on the variance and the mean of the random field and exhibits very different behavior from the non-random case: the continuous spectrum is expanded and the δ-peak, describing discrete impurity vibrations in the non-random chain with the impurity, falls into a continuous zone. © 2003 Elsevier B.V. All rights reserved.

Identifier

2442549668 (Scopus)

Publication Title

Physica E Low Dimensional Systems and Nanostructures

External Full Text Location

https://doi.org/10.1016/j.physe.2003.11.194

ISSN

13869477

First Page

912

Last Page

920

Issue

4

Volume

22

Fund Ref

Nanjing Institute of Technology

This document is currently not available here.

Share

COinS